Another great angel book is "How to talk with your Angels" by Kim O'Neill.
This is a paperback book that only cost me $7.99, you could probably find it even cheaper than that. This book gives it to you straight and really does break it down on how exactly to talk with your angels. Anyone interested in angel communication would do well to read this. I really enjoyed Kim's "light" and happy style of writing. She has an easy "9 steps to get in touch with your angels" chapter that works really well.
A big thumbs up for this angel book!