“Before You Get Your Puppy” by Dr. Ian Dunbar available for free: 

“After You Get Your Puppy” by Dr. Ian Dunbar 

“Before and After” have been combined into one book, so you may find it available as two books or one. Both are highly recommended. 

“The Other End of the Leash” by Dr. Patricia McConnell The best of Dr. McConnell’s many excellent books. Every dog owner should read this book. 

“Calming Signals” by Turid Rugaas Turid Rugaas teaches you the signals you dog uses to indicate anxiety and nervousness. A must read. 

“Culture Clash” by Jean Donaldson Donaldson pulls no punches in explaining dog behavior.