There are many books suitable for young people in their twenties. The following are some common types: Youth literature: Youth literature usually describes the growth, emotions, and adventures of young people, including novels, essays, and poems. For example, there were many outstanding youth literature works published in magazines such as Mengya and Zui Xiao Fu. 2. Fantasy novels: Fantasy novels usually describe fantasy, mythology, martial arts, and other elements. The protagonist usually experiences various adventures and challenges to finally grow and succeed. This type of novel was suitable for young people who liked fantasy and adventure. 3. Science fiction: Science fiction novels usually describe the future or ancient technology, society, and human destiny. The protagonist usually uses technology or other means to explore the unknown or solve problems. This type of novel was usually imaginative and creative, suitable for young people who liked to explore and think. 4. Mystery novels: Mystery novels usually reveal some problems between characters or social reality by solving mysteries or searching for the truth. This type of novel usually required the reader to have a certain level of logical thinking and reasoning ability. It was suitable for young people who liked challenges and exploration. 5. Masterpieces: Masterpieces refer to those classic literary works that are widely recognized and appreciated, including "Dream of the Red Chamber,""Water Margins,""Journey to the West,""Romance of the Three Kingdoms," etc. These works not only have profound thoughts and artistic value, but also are suitable for young people to read and help them understand history and culture. Of course, in addition to the books listed above, there are many other types and styles of novels suitable for young people around the age of 20, such as suspense, romance, science fiction, psychology, etc. The most important thing was to choose a novel that was suitable for him. He could obtain pleasure and inspiration from it to cultivate his interest and ability to read.