General Dog Care for the Average Pet Home

If you only read one of these books let it be this one!
It is available on kindle, audible, and in good old fashioned book form.

Let dogs be dogs by The Monks of New Skete

Others that are good
How to speak dog by Stanley Coren
On talking terms with dogs: Claming signals by Turid Rugaas
Video: Crate Games by Susan Garrett
​Video: Attention is the Mother of all Behaviors by Jane Killion (Puppy Culture)

Foundation for Multi sports

These books are also good for people who want a better bond(trained) dog but don't necessarily want to compete.

Dual Ring Dog by Jacqueline Fraser & Amy Ammen
Building Block for Performance by Bobbie Anderson & Tracy Libby
Also look into a type of training called T.E.A.M.

Tricks

You tube and google both have thousands of tricks you can teach but sometimes I still prefer books.
The Big Book of Tricks for the best dog ever by Larry Kay & Chris Perondi

Agility

Flatwork Foundation for Agility by Barb Levenson
Developing Handling Skills by Linda Mecklenburg
Knowledge Equals Speed by Dawn Weaver
​Magazine Clean Run

Advanced or Competition Obedience

Competition Obedience: A Balancing Act by Judy Byron & Adele Yunck
Magazine Front and Finish

Herding

Herding Dogs byVergil S Holland

Carting

Carting with your dog by Laura Waldbaum