Research in dog behavior and dog cognition is exciting and ongoing. Below are links to some very interesting reading and some of the institutions deeply involved in learning more about dogs.
The Arizona Canine Cognition Center publications page has downloadable pdfs for those craving a deep dive into some current and fascinating studies about our canine companions.
Below are a few books that our HDTA alliance trainers recommend:
How Dogs Learn by Mary R Burch
Reaching the Animal Mind by Karen Pryor
The Other End of the Leash by Patricia McConnell
Culture Clash by Jean Donaldson
Meet Your Dog by Kim Brophy