Literature on facing fears/overcoming trauma?

Literature on facing fears/overcoming trauma? I’ve been going a self improvement journey lately with dieting and working out. I’ve been the number on the scale doing down and I’m seeing my body look better. I’m even seeing myself do with studies. Its made me realize that if I put my mind to something, I can achieve it. That realization made me wonder why I don’t think the same way towards my speech. I recently got a job a delivery driver (worked as one a couple years back) and I’ve been noticing that my stutter seems worse now than it was then. Does anyone have some book recommendations on pushing yourself, self help, etc? Thanks in advance, and I hope everyone is doing well!