国外非常良心的电子书下载站点

This site lists free online computer science, engineering and programming books, textbooks and lecture notes, all of which are legally and freely available.

Easy and fast book searcher, create and search your private library.

一个书籍推荐网站

Zhelper V3 网址列表，额度充足 | Zlibrary 助手 V3 | Zhelper