Self-help books on stuttering?

Self-help books on stuttering? Hi Guys, I've been stuttering/blocking since early teens, I'm now 28M and I carried it along. I personally believe it's a mental habit that formed for some reason and never broke out of it. Thanks to nuroplasity, our brains can change and grow but it takes time. I've seen a stuttering book on Amazon w/ good reviews. Anyone recommend? It's blue and called 'Stuttering' by Hanan Hurwitz.