I don't have a book or anything but I can tell you what worked for me. like you I had all those messages in my head telling me I was no good. I needed something to counteract that. so I started with one indisputable fact about me. I am a good professional writer. I write excellent reports. there is no denying this no matter how bad I feel about myself. I could always deny that people loved me, my kids only loved me because I was their mom, my boss loved me because I kept her together, but I could never deny that I was a good writer. I had physical evidence for that. all the As and praise throughout school, the praise from attorneys and the courts on the reports I had written. so when I was feeling down on myself for something, I would say to myself, yeah I may be bad at this, but I am an excellent writer and I would feel good again. slowly I started finding more indisputable facts about me until I had a whole file of them in my head. I eventually got to the point where I could even say people loved me and believed it. it took years mind you, but I have good self esteem today. it only starts with one. take care