I have resisted listing every book I have ever read on DNA to recommend just these two, which also form the basis of my sources for DNA information:
- The Family Tree Guide to DNA Testing and Genetic Genealogy by Blaine T Bettinger - Family Tree Books - ISBN-13: 978-1-4403-4532-6
- Genetic Genealogy - The Basics and Beyond by Emily D Aulicino - AuthorHouse - ISBN 978-1-4918-4090-051995