Open Author lets you combine text, pictures, sound, files and video. Saved as openly licensed educational resources, you can share them with friends and educators from around the world.
Watch this video below to learn how to make your own OER textbook using the Open Author tool in OER Commons.
Though not open source it is available at Ara. Provide ICT your asset number and ask them to deploy it to your device. This You Tube video below shows some of the features. You can see a good example of its use on Ara's Library Search site if you watch "How to use Library Search".