快速切换搜索多个电子书网站资源
IT eBooks - Free Download eBooks Library
This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available.
鸠摩搜索引擎
一个书籍推荐网站
中文数字图书馆,图书来自Z-Library.
电子书资源站
