To determine whether a book was pirated or genuine, one could start from the following aspects: 1. Price: The price of a legitimate book is usually higher than the price of a pirated book because legitimate books need to pay copyright fees while pirated books are illegal and do not need to pay any fees. If the price of a book is significantly lower than the price of the original book, then it is likely to be a pirated book. 2. Print quality: Genuine books are usually printed better than pirated books because they need to go through strict quality control and printing processes to ensure the quality and accuracy of the books. Pirated books, on the other hand, might use low-quality printing materials, resulting in poor printing quality. 3. Information about copyright: Genuine books usually have copyright information, including author, publishing house, publication date, etc., which can be found online. Pirated books might not have this information or the information might be incomplete. 4. Book Cover: The cover of a legitimate book usually has the logo of the legitimate publishing house and the name of the author. Pirate books may not have these symbols and names. 5. Book packaging: The packaging of genuine books is usually more exquisite than pirated books, including the front cover, back cover, spine, etc. However, pirated books might not have such details. It is important to note that due to copyright issues, pirated books are illegal. Buying pirated books is illegal, so it is recommended to buy genuine books to protect rights.