Is this a good book to help me save money

no. if you have noticed that you make purchases compulsively, then that is something that you can first admit and confess. after you have done that, you can make a plan to control yourself. a christian pastor could help, or a psychotherapist. but it's your choice.

No book is good to solve a spending problem. There's something else that also starts with a B that you can do to save money.