Amazon. Bain of existence or welcome supporter of the independent author?
I'll leave that to you to decide. But at the moment, Amazon is not on my list of "favorites" due to problems with title availability. If you're looking to purchase The Approximate Parent, your best bet is to get it from the website
The Approximate Parent: Discovering the Strategies that Work for Your Teenager at
www.theapproximateparent.
There you'll find the least expensive edition, quick shipping and can ask to have your book signed, if you like. Or you can sign the book. See--so many choices!
You can still find the book online at other Internet retailers like Barnes & Noble, but
www.theapproximateparent is your best bet for the lowest price and getting the product fresh out of the oven.