Need some recommendation.

Need some recommendation. Are there some good books(kind of self help books) which I can read on Stuttering/Stammering. I want to learn and practice some techniques. ​ One more question, ​ Yesterday on Wikipedia I was reading about Rowan Atkinson(aka Mr. Bean!). ​ > Atkinson suffers from a stammer, and the over-articulation is a technique to overcome problematic consonants. ​ I want to read more about this technique. I request you to please share some authentic and genuine sources on this? ​