Here's my review of my favorite clicker training book:
Clicker Training for Birds: My Parrot Training Bible Best in Flock - Parrot Blog
A few more books/resources I recommend:
Parrot Training Resources and FAQs Best in Flock - Parrot Blog
And a link to a FREE issue (back copy) of Barbara Heidenreich's magazine:
Free Issue of Good Bird Magazine Best in Flock - Parrot Blog
I also really like the book Don't Shoot the Dog (it's not about dogs):
Don’t Shoot the Dog: Book Review
Just a couple resources to get you started!