I have found a lot of the books I have read at the library. All about saving $$$$. Plus, Amazon.com has a lot of used copies as well.
Oh, and I don't know if anyone has told you, but DO NOT let your H know about the DB/DR books or its teachings. It is strictly for you. If your H knows about this stuff, he may think you are only changing to try to trick him to come back.
If praise is a 180, then a good idea. You know what is too much though. The idea is to create some interest in your H coming back, so you are working on you to make yourself more attractive - not just physically, but in all the other ways. You want confidence.