Bakerella Cake Pops
Cake Pops by Bakerella is a good first book to turn to if you are just starting out. Not only does it have cake and frosting recipes to try, but is shows how to do them using boxed mixes and canned frosting. It shows you literally baby-step by baby-step on how to roll or form standard cake balls, basic cake pops, and cupcake pops and balls.
Read the review about this and the cookbook from Molly Bakes, too.