There ist the free Book "Self Therapy for the Stutterer - by Malcolm Fraser". It's a lot of work, but it helped me to work at my stuttering, Sure I still stutter a bit, but I' have gained so much control over it. [https://stutteringhelp.org/sites/default/files/Migrate/book0012\_11th\_ed.pdf](https://stutteringhelp.org/sites/default/files/Migrate/book0012_11th_ed.pdf)