bookShop is an OSS ruby-based framework for docbook toolchain happiness and sustainable productivity. The framework is optimized to help developers quickly ramp-up, allowing them to more rapidly jump in and develop their DocBook-to-Output flows, by favoring convention over configuration, setting them up with best practices, standards and tools from the get-go. This gem is brought to you by World Uniting Press, a division of World Uniting.We are constantly adding new features, but currently bookShop features the ability to take a DocBook format of a book and convert it to ePub (Apple iBook), pdf (Print), and mobi (Kindle) versions.
If you would like to see an example of a DocBook book that is currently in production and being published, you can look at the source for D.a. Thompson's book, Over Coffee. D.a. has released this work under the Creative Commons license.