Just a general "what's up with that?" entry here:

Books with authors who use "Dr." as a prefix. Stop it.

I guess "Dr. Phil" is the corniest manifestation of this phenomenon, the cheesy, bullying effort to establish some kind of authority over the unlettered peasantry. Oooh - the Doctor is in! Quick - everybody to the town square for the laying-on of hands!

It wouldn't be so bad if it weren't for the additional, inevitable use of the "M.D." or "Ph.D." suffix at the end of the author's name. Hey fatheads - the suffix is all you need! People understand what M.D. and Ph.D. mean.