You can read and download these books for free:

• If Your Child Stutters: A Guide for Parents [1]
• Si su hijo tartamudea: Una guia para los padres [2]— Spanish translation of If Your Child Stutters: A Guide for Parents
• The Teacher Who Made a Difference [3] by Corinne M. Litzenberg
• Advice to Those Who Stutter [4] by 28 therapists who stutter themselves.
• Trouble at Recess [5] by Jamie   Spanish [6] version
  
• Sometimes I Just Stutter [7] by Eelco de Geus
• Self-Therapy for the Stutterer [8] by Malcolm Fraser
• The Child Who Stutters: To the Pediatrician [9] by Barry Guitar, Ph.D., and Edward G. Conture, Ph.D.
• Stuttering: Straight Talk for Teachers [10]
• Stuttering: Its Nature and Management [11] by Courtney Stromsta, Ph.D.
• My Very Own: I can Do It Storybook! Starring Me [12] by Julie Raynor
• The Girl Who Stutters [13] by Mia J., Rebecca D., and Casey W.
• Pages 77-81 from Stuttering: Successes and Failures [14] by Joseph Sheehan
• The Stuttering Little Ballet Boy [15] by Sohel Bagai

Also see Translations [16]