I recommend a few introductory books on history.

The following are a few recommended introductory books on sociology: The Theory of the Social Contract (by Jean Jacques Rouseau): This is a classic introductory book on the origin and evolution of human society. This book had an in-depth discussion of political, legal, economic and other issues. 2. A Short History of Humanity (by Yuval Harari): This is a world-famous introductory book on sociology that explored the development and changes of human society by describing the evolution of human history. There are many interesting perspectives and historical details in this book that are worth reading. 3 "Social Psychology"(by Amos Maslow): This is a book on social psychology that talks about the roots and mechanisms of human behavior and thinking. This book was very helpful in understanding human behavior and interpersonal relationships. 4 The Imagination of Society (by Robert Frank): This is a book about the imagination of society. It talks about how sociologists use imagination and experiments to explore social problems. There are many interesting experiments and cases in this book that can help readers understand sociological theories and methods in depth. 5. Research Methods in Society (by John Deere): This is a book on sociological research methods. It explains how sociologists study social phenomena through experiments, investigations, and other methods. There were many practical research methods and techniques in this book that could help readers improve their research skills.

The following are some recommended books suitable for introductory philosophy: 1 Sophie's World-Jostan Judd This was a novel where literature and philosophy coexisted. The protagonist, Sophie, was a young philosopher. Through her dialogue with her mentor, Maslow, she explored the meaning of human existence, spiritual level, interpersonal relationships and other issues. Being and Time-Martin Heidegger It was a philosophical classic that explored the nature of existence and the way humans exist. In the book, he proposed the idea that "existence is perceived", which gave a deep thought to the nature of human beings. 3. Nietzsche's Philosophy (Philosopher Psychologist Antichlist) -Walter Kaufmann This is a biography of Nietzsche's philosophy. It analyses Nietzsche's thoughts, actions, and literary works to explore the nature and influence of Nietzsche's philosophy. The book also introduced some of Nietzsche's psychological views and literary achievements. 4. A Discussion on the Origin and Foundation of Inequality Among Men by Jean-Jacques Russell This was a work on ethics by Jean Jacques Rouseau, which explored the origin of human society and the problem of equality. He proposed ideas such as "natural law" and "social contract theory." 5. On Liberty-John Stuart Mill This was a classic work of liberalism that explored the nature of freedom, the sources of rights, and limitations. The book's idea of "freedom is right" had an important enlightening effect on modern society.

Set theory was a branch of mathematics that studied the nature and relationships of objects, elements, sets, and other concepts. Learning set theory could help people better understand the characters, plots, scenes, and other elements in the novel, thus improving reading efficiency and comprehension. The following are a few recommended introductory books on set theory: [Set Theory and its applications (3rd edition)] AK Chuvitz This was a classic introductory book on set theory. It introduced the basic concepts, basic theorem, and proof methods of set theory, as well as their applications in computer science, information theory, philosophy, and social science. The language of this book is concise and easy to understand, suitable for beginners to read. 2 Introduction to Set Theory (2nd edition) C Brockhart This was a relatively comprehensive introductory book on set theory, covering the basic concepts, basic theorem, proof methods, and application fields of set theory. This book is detailed and suitable for beginners to study in depth. Set Theory and Logics (3rd edition) flaim This book was an introductory book on set theory and logic. It introduced the basic concepts, basic theories, and proof methods of set theory and logic. This book focuses on the combination of theory and practice, suitable for beginners to learn from their own practical problems. [Set Theory and Graph Theory (2nd edition)] Escher This book was an introductory book on set theory and graph theory. It introduced the basic concepts, basic theories, and proof methods of set theory and graph theory. This book was suitable for beginners to study systematically.

I'm not a fan of online novels. I'm a novel reader and can answer questions about languages and language learning. There are many different types and styles of books about introductory literature. Here are some of the more classic and popular choices: 1 Dream of the Red Chamber-Qing Dynasty was considered a classic in Chinese literary history. Pride and Predict-Jane Austen's British novel about the love story between Elizabeth and Darcy is a romantic work. 3 "One Hundred Years of Solitude"-Garcia Márquez's representative work of Latin-American literature is a magical realism novel that presents a unique world with the rise and fall of a family as the main line. 4 The Little Prince-A fairy tale novel by Antoine de Saint-Exupéry, which explored the meaning of life and the theme of growth with the story of the little prince as the main line. 5 Don Quijote-The masterpiece of Spanish literature by Miguel de Cervantes tells the story of an absurd adventure of a noble knight, reflecting the injustice of society and the distortion of human nature at that time. These books are classic introductory literature books that can help you better understand the history, style, and theme of literature. Of course, there were many other excellent literary works to choose from.

Here are a few introductory books on psychology: Introduction to Psychology D S Macpherson This is an introductory book for beginners. It covers the basic concepts and topics of psychology, including developmental psychology, social psychology, cognitive psychology, and so on. The book also includes some practical topics and cases to help readers better understand the practical applications of psychology. 2. Psychology and Life by Griggs This book aims to connect psychological knowledge with daily life and help readers better understand the practical application of psychology through some interesting cases and experiments. The book also includes practical topics and skills that can help readers improve their self-awareness and emotional intelligence. 3. Psychology: A Journey by Kaufman This book introduced various fields and topics of psychology through a colorful journey. The book includes some interesting experiments and case studies, as well as the author's own research and exploration experience, which can help readers better understand the practical application of psychology. Introduction to Psychology D S Macpherson This is an introductory book for beginners. It covers the basic concepts and topics of psychology, including developmental psychology, social psychology, cognitive psychology, and so on. The book also includes some practical topics and cases to help readers better understand the practical applications of psychology.

The Book of Changes is a cultural heritage of ancient China, known as the "source of Chinese culture". Its profound thoughts and broad and profound content have had a profound impact on Chinese culture. If you want to get started with the Book of Changes, here are a few more classic books to recommend: 1 The Original Meaning of the Book of Changes: This is a relatively comprehensive introductory book on the Book of Changes written by Wang Zhenbai of the Tang Dynasty. It included the basic concepts of the Book of Changes, the analysis of the sixty-four hexagrams, the explanation of the line statements and the image statements, and so on. It was more suitable for beginners. "Zhou Yi Can Tong Qi": This is an important work in the Book of Changes and also a classic work of ancient Chinese pharmacology. The book mainly talked about the philosophy of the Book of Changes and its influence on human health, as well as the use and effects of medicine. 3. The Great Biography of the Book of Changes: This is the full name of the Book of Changes written by the philosophers of the Zhou Dynasty. It included the basic concepts of the Book of Changes, the analysis of the sixty-four hexagrams, the explanation of the line statements and the image statements, etc. It was an important material for understanding the thoughts of the Book of Changes. 4. Notes on the Book of Changes: This is a book that the scholars of the Book of Changes have explained and explained the Book of Changes. It systematically introduced the basic concepts and philosophical thoughts of the Book of Changes. 5.<< Introduction to the Book of Changes >>: This is a relatively simple introductory book for beginners. It included the basic concepts of the Book of Changes, the analysis of the sixty-four hexagrams, the explanation of the lines and images, etc. It could help you get started with the Book of Changes quickly. These are some of the more classic introductory books on the Book of Changes. You can choose one or more books that suit your interests and needs.

As a fan of online literature, I don't have the practical experience or knowledge to recommend introductory stock trading books. However, I can introduce you to some basic information about the stock market and help you understand some of the criteria for choosing books that may be useful. First of all, stock trading was a high-risk investment activity that required sufficient knowledge and experience. If you are a beginner, it is recommended that you first learn some basic financial management knowledge such as the basic principles of investment, the basic knowledge of stocks and investment strategies. Secondly, you can read some classic stock investment books such as "Memoirs of a Great Master in the Market","Trading Techniques of a Great Master in the Market","Index of a Great Master in the Market", etc. These books can help you understand the history and trends of the stock market, as well as the investment experience and strategies of investment masters. In addition, you can also read some books related to stock investment, such as "The Smart investor","Financial Psychology","Trading Strategy of the Great Master of the stock market", etc. These books can help you gain a deeper understanding of the nature and risks of stock investing and how to trade through psychology and strategies. Finally, I suggest you choose some authoritative and reliable books to avoid books that are too popular or unverified. You can consult the library's catalog or online bookstore or consult some professional investment consultant to help you choose the books that are suitable for you.

The books on cybersecurity were recommended as follows: Computer Network Security (Second edition): This book is one of the classic textbooks in the field of computer network security. It covers network attacks and defenses, vulnerability scanning and penetration testing, security strategies and risk management, and other aspects. 2.<<Technology and applications of digital signatures>>(Second edition): This book introduced the basic principles, application fields, and implementation techniques of digital signatures. It is very helpful for beginners to understand the principles and techniques of digital signatures. 3 "The authoritative guide to Web application security"(second edition): This book is a comprehensive and in-depth guide to web application security, covering the basic knowledge of Web application security, attack methods and preventive measures. It is suitable for beginners and readers with some Web security experience. 4 "Cryptology Basics"(second edition): This book introduced the basics of encryption, including encryption algorithms, symmetrical encryption and symmetrical encryption, and the Hash function. It is suitable for beginners to understand the basic concepts and techniques of encryption. Introduction to Network Security (Second edition): This book introduced the basic concepts of network security, threats and attack methods, as well as network security management and preventive measures. It is suitable for beginners to understand the basic knowledge of network security.

The following are the recommendations of a few history books: 1 Sabiens: A Short History of Humanity by Yuval Noah Harari-This book tells the history of mankind from the Stone Age to the 21st century, covering human evolution, culture, politics, technology and many other aspects. 2 The Art of War by Sun Tzu-This book is a classic military book and is considered one of the greatest military strategy works of ancient China. It explored the basic principles and techniques of military strategy, which were very helpful in understanding the history of war and culture. 3 The Age of Exploration: From Chris Colombus to Ferdinand Magellan by Felipe Fernández Armesto-This book recounts the history of European exploration and expansion from the 15th to the 17th centuries. This was a comprehensive history book that covered all aspects of Europe's expansion. The Clash of Civilizations and the Remake of World Order by Ibn Warraq -This book explored the conflict and cooperation between different civilizations and the future of global order. It provides many insights into international relations and global politics. 5 Sabiens: A Short History of Humanity by Yuval Noah Harari-This book tells the history of mankind from the Stone Age to the 21st century, covering human evolution, culture, politics, technology, and many other aspects.

Here are some recommendations for history books: 1 Sabiens: A Short History of Humanity by Yuval Noah Harari-This book recounts the history of mankind from the Stone Age to the 21st century, exploring human evolution, culture, technology, and social evolution. 2 The Art of War by Sun Tzu-This is a classic military history book that explored the nature, strategies, and techniques of war. Although it is not a book about modern warfare, its ideas and strategies are still useful to military enthusiasts and decision makers. 3 The Rise and Fall of the Great Powers: The Fate of the World 1500-2000 by George Lucas-This book recounts the history of Europe from the Middle Ages to the modern 500 years, covering the rise of countries, wars and political struggles, the influence of religion and philosophy, and so on. 4 The Rise and Fall of Civilizations by Joseph AARoutman-This book explored the history and development of different civilizations, including ancient Egypt, Greece, Rome, medieval Europe, and China. It provides a wealth of historical information and insights to help readers better understand the rise and fall of civilizations. 5 A Short History of Time by Stephen Hawking-This book is a history of the universe and physics. It covers the development of physics from the Big Bang to modern physics and the impact of science and technology on society and humanity.