My Smart Puppy, by Brian Kilcommons and Sarah Wilson [Amazon Smile link]
If you’re only going to read 1 book, this is the book to read. Relentlessly thorough, this is a great guide for training a dog of any age. Don’t worry about how cheesy the title seems, this is one of the best books out there.
How Dogs Learn, by Mary Burch and Jon Bailey [Amazon Smile link]
This book bridges the gap between modern dog training techniques and behavioral psychology. It will give you a framework upon which to judge the training style and system used by the different trainers you may meet or work with.
Leader of the Pack, by Nancy Baer and Steve Duno [Amazon Smile Link]