I have been following PressBooks for a while now and this is a beautiful option for publishing eBooks.  They just published a manifesto on the future of publishing. Essays from the bleeding edge of publishing.

About this book:

The ground beneath the book publishing industry dramatically shifted in 2007, the year the Kindle and the iPhone debuted. Widespread consumer demand for these and other devices has brought the pace of digital change in book publishing from “it might happen sometime” to “it’s happening right now”—and it is happening faster than anyone predicted. Yet this is only a transitional phase. “Book: A Futurist’s Manifesto” is your guide to what comes next, when all books are truly digital, connected and ubiquitous.

Through this collection of essays from thought leaders and practitioners, you’ll become familiar with a wide range of developments occurring in the wake of this digital book shakeup:

* Reexamine your assumptions about the role of a book publisher, as we move from container to context

* Understand the kinds of things we can start doing with digital books

* Look inside some of the publishing projects that are at the bleeding edge of this digital revolution

* Learn how some digital books can evolve moment to moment, based on reader feedback.

With “Book: A Futurist’s Manifesto,” we at O’Reilly Media are actively practicing what we preach. Written and edited on PressBooks.com, a new web-based book-production system, this book also invites reader feedback throughout its development.

Read the chapters from Parts 1 (The Setup) and 2 (The Outlook), and tell us what you think. Part 3 (due out in Spring of 2012) will focus on living examples of publishing projects that are pushing embracing the new possibilities of digital.

This second release of this ebook — containing Parts 1 and 2 — is priced at $9.99; the final version of the book, including all three parts, will be priced higher. Buy this release now and you’ll receive all updates at no additional cost. Naturally, it will be available in multiple formats, including a print edition when the book is complete.