Hi Morwenna
Not a book as such but some free references for your perusal:
Preschool treatment – with multiple RCT level evidence – the Lidcombe program
https://www.uts.edu.au/sites/default/files/2020-11/Lidcombe%20Program%20Treatment%20Guide%202020%20v1.1%202020-11-28.pdf
Adolescent / Adult treatment – the Camperdown program
https://www.uts.edu.au/asrc/resources/camperdown-program
Free online treatment program for social anxiety related to stuttering – iGlebe
https://www.uts.edu.au/asrc/resources/iglebe
Kind regards
Kim
