Lisa,
A good introduction to clicker training, along with some great advice on games to play that help you and the dog get used to it is the book "When Pigs Fly" by Jane Killion… very informative and easy read, with plenty of great advice on training "hard to train" dogs. I got it on my iPad for $9.99, but I think it's also available from DogWise for about $15 for a hard copy!
=Nate