My favorite DNA books are not about the science behind DNA.
I'm much more interested in genetic genealogy. And, frankly, you only need to understand a few basic principles about DNA inheritance and the different types of DNA tests.
My own book, Finding Family: My Search for Roots and the Secrets in My DNA, was the pioneering book and is still a classic earning great reviews from new readers.
My own Guide to DNA Testing is the perfect starting place. It's short, easy-to-understand, and just $3.99 since it is only available as a Kindle eBook.
Once you have that information as a foundation, I suggest you dive into the following book by Blaine Bettinger. I'm copying my review of the book from Amazon.
An Owner's Manual for Your DNA. This 240-page book is the most complete and up-to-date resource on genetic genealogy. While some material is too advanced for raw beginners, you will want this comprehensive book on hand as you work your way through the DNA testing process.
Blaine clearly explains all the different DNA types and their individual inheritance patterns. Then he adds lots of supplementary information, including a great list of More Resources.
Blaine naturally encourages readers to read his book from start to finish. But not many people read their vehicle owner's manual before taking their new car for a ride.
Likewise, you don't need 100% of this knowledge before jumping into the exciting world of DNA testing. Furthermore, each topic will make much more sense when you have your own results to look at.
Do read enough to understand the key points. For example, it's important to know that autosomal DNA passes on random selections of each parent's DNA. But you can get by without knowing exactly HOW recombination occurs.
The subject of X-DNA inheritance confuses even experienced testers. So just skip that chapter until (and if) you encounter a situation where an understanding of X-DNA is needed.
The book is available in both print and Kindle formats. I purchased the print version due to the many excellent tables and illustrations.
Since the groundbreaking classic, Finding Family: My Search for Roots and the Secrets in My DNA, many more DNA success stories have appeared. I'm sharing my review of one in particular.
A Compelling Personal Story with the Power of a Documentary. As the first adoptee to identify and reunite with birth family through genetic genealogy, I have long been advising countless adoptees on DNA testing.
As such, I have heard and read scores of adoption stories, both good and bad. American Baby is both a true story and the most comprehensive overview of adoption history I have ever read.
Gabrielle Glaser does a phenomenal job of blending a very personal story with a well-researched documentary. The book held my interest from beginning to end.
Adoptees, birth parents, and adoptive parents clearly need to read this book. Yet almost everyone is touched by adoption in some way. Therefore, I heartily recommend this book to all.