I also have read The Other End of the Leash and I recommend it too.

I also recommend:

Culture Clash by Jean Donaldson
Dont Shoot the Dog by Karen Pryor
Power of Positive Dog Training by Pat Miller (I am going to an internship with her this summer)
On Talking Terms with Dogs by Turid Rugaas
Excelerated Learning by Pam Reid
The Dog Whisperer by (Is it Bruce Fogle??? forgot this one)