后缀名为.epub 的是什么文件？要怎样打开？

.epub文件类型：Open eBook File

扩展名为.epub的文件是一个数据文件。
文件说明：
Digital ebook saved in the EPUB format, an open XML-based format for digital books and publications; provides a standard digital publication format for publishers and consumers; can be viewed with supporting software programs and hardware devices, such as the Amazon Kindle and Sony Reader.
The EPUB format is based on three open standards, including the Open Publication Structure (OPS), the Open Packaging Format (OPF), and the Open Container Format (OCF); all three standards are produced by the International Digital Publishing Forum (IDPF)..epub

打开.epub文件
Linux系统
FBReader
dotReader
calibre (推荐）

Mac OS系统
Adobe Digital Editions
Lexcycle Stanza
FBReader
calibre
　
Windows系统
Adobe Digital Edition
Lexcycle Stanza
Mobipocket Reader Desktop
FBReader
dotReader
calibre

一种优秀的电子书文件。可以有目录、插图等。
电脑上可以用epub阅读器，手机上ireader QQ阅读都可以打开