I don’t know of any good books, but I’ll definitely be checking back to see if anyone else has a suggestion.
However, I do know that there is a Catholic weight-loss program out there called “The Light Weigh.” It’s something that you would start at your parish by first advertising, gauging interest, setting up a regular meeting, and paying a registration fee. The fee is around $125 I think (I looked into it once but never did it), but if you’re the coordinator and get a certain # of people signed up, your materials would be free. The meetings consist of viewing a video every week and then having a brief discussion I think.
Good luck, weight loss has been such a struggle for me. I’ll keep you in my prayers!
Jen Z.