If you’ve been shopping for etextbooks or ereaders you have probably come across the ePub format. The ePub format is just an open source format for reading e-books. It is based on XML and has been adopted by iTunes and the iPad, the Barnes & Noble Nook, and the Kobo eReader. There are also many online e-book readers that use the ePub format, such as the bookworm online e-book reader and Adobe Digital editions. Many libraries also have e-books in the ePub format, and most of the popular textbook sites have eTextbooks in the ePub format.
If you want to convert your PDF files into ePub format you can use a free tool called Calibre. Calibre is a free tool that can be used to organize ebooks and convert your ebooks to different formats. Even though, the standards of eBooks are starting to make sense, there will still be times when you may have an eBook in a different format other than your ereader accepts. Times like this are when a tool like Calibre can really come in handy.
Eventually, after being online for awhile, you will begin to have a rather large eBook collection, some may be in the Kindle format, some may be PDF files, and some may be ePub books. A tool like Calibre can really help to keep things organized and not let your ebook collection get lost in the shuffle. This tool is more than an ebook format conversion tool, it is also a library management tool, that can convert formats, and sync to your ereader devices. You can even use it to download and convert news from the web. It can also be used to view your ebooks and as a content server for online access to your ebooks. If you are using etextbooks or ereaders, having Calibre on your computer can be very useful.