Both these books offer tons of info on basic care. You'll learn that while green iguanas can be purchased at little cost, the right equipment when all is said and done will hit your pocketbook. Iguana care is hard work, and young kids can't do it alone. Schilling says too many people keep a single ferret inside a cage for days at a time without being let out. She calls this treatment inhumane.
Ferrets require daily interaction with people, and a chance to explore and exercise.
She describes how to teach a ferret tricks, like to jump through hoops. Those who currently have a green iguana or ferrets may also find these books helpful. He acts as a hot water bottle and saves fuel and power. Inside of a dog, it's too dark to read.