i would definitely take a look into reading caroline knapp's Appetites. While the book explores different levels of eating disorders, it also goes into detail about other self-destructive behaviors. It also goes in depth on sociological issues regarding dieting and how that affects a person.
Eating in the Light of the Moon also offers a different take on eating disorders. It takes a metaphorical stance and helps to analyze your ed.
hope that helps
and i will def. look into that wrkbk