Emy, have you had a specific diagnosis of what is causing this problem? I ask because in my case, a GI told me I was incontinent (because of ongoing diarrhea) and sent me for Pelvic Floor therapy. A colorectal surgeon said therapy could help me control the urges somewhat problem but weak Pelvic Floor muscles were not causing the diarrhea. Turns out I have IBS.
I think if were you I would wait to order the book until after starting the therapy and finding out more about what is causing your problem. Good luck!