I’ve found a rather unusual eBook to offer today. O’Reilly, a publisher of technical manuals and reference guides, has just released a short intro into the soon-to-be-released Epub3 eBook format. It’s currently available a a free and DRM-free download.

We’ve covered Epub3 from time to time on this blog, but I don;t know that we’ve ever completely explained what it is and how it differs from the Epub eBook that you may have purchased for you Nook, Kobo, or Sony Reader. What Is Epub 3? should answer most of your questions.

Here’s more details from the description: “What is Epub 3? discusses the exciting new format that is set to unleash a content revolution in the publishing world. Laden with features the printed page could never offer–such as embedded multimedia and scripted interactivity–EPUB 3 will forever change what a book can be. This article walks you through the format and puts it in its place in the digital landscape, explaining why EPUB 3 is set to become the new global standard for ebooks as it also becomes the new accessible standard for ebooks.”

O’Reilly