Here are some books that are recommended for training.  Some also address how dogs learn.

Don't Shoot the Dog- Karen Pryor

Reaching the Animal Mind- Karen Pryor

Click to Calm- Emma Parsons

Really Reliable Recall- Leslie Nelson

The Other End of the Leash- Patricia McConnell (all of her other books are great too)

The Culture Clash- Jean Donaldson

Also go to www.dogwise.com for additional books and to purchase those mentioned.  There are also dvds, toys, and other dog related items for sale.