There are many websites that offer free academic e-books. The following are some of the commonly used websites: 1 Project Gutenberg: This is a free e-book website that collects many classic novels, poems, and academic works, including shakespeare's plays and other European literary works. 2. E-Book Library: This is an online e-book library with a large number of free e-books, including academic works, novels, and historical books. wikipedia: wikipedia is a free, open online encyclopedia that contains a lot of academic content. you can find information on various subject areas on it. 4. Academic search engines: You can use academic search engines such as Google Academic Search, Baidu Academic Search, etc. to find various academic works and papers. You can also find relevant academic papers through keyword search. 5. Academic Press: Academic Press often publish free academic e-books. You can find the download link of the e-book on their website. For example, the People's Military Medical Press would regularly publish medical e-books. It is important to note that free academic e-books may contain some copyright content, so when downloading and using these e-books, you need to abide by relevant laws and regulations to ensure that your actions are legal.