Melinda Johnson's book is called:
Getting Started: Clicker Training for Birds. I have it and recommend it.
She also runs the
Yahoo Group: Bird Click - a terrific, free resource. The files contain some case studies w/ specific step-by-step training of an aggressive cockatoo, so you should find those particularly helpful.
Here are two recent posts by respected bird trainers about some of the "secret silver bullet training methods" that are aggressively marketed on the web:
Bird Training Blog » Blog Archive » The Real Secrets of Training Success and Where to Find Them
How Not to Tame a Bird | Carly Lu's Flight Blog
(Basically, if it's too good to believe, don't believe it!)