'Yes, your teeen is crazy!' by Michael J. Bradley
'Get Out of My Life, but First Could You Drive Me & Cheryl to the Mall: A Parent's Guide to the New Teenager, Revised and Updated' by Anthony E. Wolf
The second title may possibly be history's longest!
These two books come highly recommended...but not by me because I haven't read them. They were suggested to me by two junior high youth workers I recently met as we were discussing tools to put into the hands of parents.