Then, after converting your work into an ePub file and verifying it with ePubCheck 1.0.5, you’ll need to apply for an ISBN.

Most retailers will simply reject any EPUB that doesn’t pass EPUBCheck. Thanks to the test suite created for EPUB 3.3, the current version of EPUBCheck already conforms to it, and most of the ...

The conformance checker for EPUB publications. Contribute to w3c/epubcheck development by creating an account on GitHub.

EpubCheck evaluates your file’s container structure and markup, and it also checks for internal reference consistency. It’s an open source project which you can run on your own machine.

I’ve previously mentioned the epubcheck wiki and the mobileread epub forum as helpful sources of info for error troubleshooting, but I wonder if there are others.

Python wrapper for epubcheck. Contribute to titusz/epubcheck development by creating an account on GitHub.

The Worldwide Web Consortium is moving to the next phase of its Publishing@W3C work, including looking for improvements to EPUB.

Bug hunter Craig Arendt has reported vulnerabilities in major eBook readers including those from Apple, Google, and Amazon. The similar but separate XML external entity (XXE) flaws also impact all ...

Book Proofer, a tool that Apple created and distributed to help ebook developers, does not work on Yosemite and iOS 8. But that’s OK, because it turns out that iBooks on the Mac now incorporates its ...

Barnes and Noble has announced today that they have implemented a number of enhancements to their EPUBCheck tool to help solve common eBook errors. This will assist indie authors and publishers to ...