Free e-books referred to e-books that were downloaded and read for free on the Internet. Usually, e-book producers provided free downloads for readers to download and read through a variety of limited-reading software such as JDowncharger, Loaders, etc. The advantage of free e-books was that readers could save money by downloading and reading them without paying anything. At the same time, free e-books could also attract more readers and increase the income of e-book producers. However, there were some problems with the free e-books. Some e-books may be published with poor quality, and readers may be at risk of downloading viruses or malicious software. In addition, free e-books may not cover all books. Some books may have to be paid to read. Therefore, readers should be careful when choosing free e-books. They should try to choose some well-known e-book producers and high-quality e-books. At the same time, readers could also buy physical books to obtain a better reading experience and collection value.