To Siri With Love, by Judith Newman
I loved this book because it brought me into the world of people who have ASD (Autism Spectrum Disorder). It showed me how the world appears to them, and made me aware of how I could help to make their surroundings more comfortable or at least, not harder to handle. You know that saying, walk a mile in my shoes (Elvis?)... this will get you a few hundred yards into the life of a person with ASD and his/her family.