There are many web sites where you can purchase a "stuttering therapy" either through the mail or a download on the site. The book that helped my family, Self Therapy for the Stutterer, is available for free download here http://www.stutteringhelp.org/Default.aspx?tabid=630. Other books are on that page, plus Sometimes I Just Stutter is on this page http://www.stutteringhelp.org/Default.aspx?tabid=209.
One thing especially nice about the Foundation's books and videos are that they are available free at most public libraries or for a very low cost if you prefer your own copy. You don't have to pay a cent for the downloads. That's because the man who started it was a stutterer and really wanted to help others in the same situation.