Can't really think of any good books offhand. Most don't really go into progressions or enough of what you need.
DVD's there are. Check out GymSmarts.com as they have many that are excellent, especially the Mas Watanabe material.
Start off with some articles over on Drills&Skills.com . Until you have a decent handstand, front handsprings are far away as are back handsprings. Until you have a decent cartwheel, don't worry about round-off. These two skills set you up for a lot of inverted awareness stuff besides front and back limbers.
Front and back flips are very different but often not taught until you can already do handsprings.
Is another video I have seen recently that shows a lot of promise from the trailer.