A practical book that helps you understand the characteristics of developmental disabilities and learn effective communication. Author: Masami Sasaki Price: 1400 yen + tax Contents: Understanding the characteristics of developmental disabilities, Explaining the key points for effective communication Features: Suggests specific ways to use language Thank you for looking. I have included photos to show the condition, which I have assessed as a layman. I believe the main body of the book is in good condition. Please refrain from purchasing if you are overly concerned about the condition.