what is a good book for an inmate to read on relationships and family?

Answer 1

You might want to start with some books by Pema Chodron, an all-time favorite is: "The Wisdom of No Escape and the Path of Loving Kindness"

You might also find the writing of Ramtha helpful:

A Beginner's Guide to Creating Reality, Third Edition
Ramtha: The White Book

These are unusual reading materials. However, if you want to improve relationships, first you need to fully undertand yourself.

Also, the books by the Dalai Lama and Thomas Merton should provide excellent insight into life for you.