My daughter's ped wrote a book on bedwetting, I'd start there rather than Children's. Friends have done consults on the issue and all made good progress and were pleased. Boys esp like Dr. Bennett.
Dr. Howard Bennett at Chevy Chase Peds, close to Politics & Prose, 5225 Connecticut Ave. NW. 202-363-0300
http://www.amazon.com/Waking-Up-Dry-Children-Bedwetting/dp/1581101562
Good luck!