https://calibre-ebook.com/download calibre
https://www.fosshub.com/Calibre.html win 64 bit calibre 下载地址
calibre is a powerful and easy to use e-book manager. Users say it’s outstanding and a must-have. It’ll allow you to do nearly everything and it takes things a step beyond normal e-book software. It’s also completely free and open source and great for both casual users and computer experts.
PS：
京东阅读 也可以打开epub
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