Alzheimer's Book

Neighbors I'm looking for a book for Alzheimer's caregivers that will help my dad understand what is happening to my mom & how to best care for her. Her dementia is progressing, and he refuses to attend classes at the Alzheimer's Association or go to a support group. I'm thinking he would be more receptive to a book he could read & study that would not involve discussion with others. Appreciate any recommendations! Pam