I just ordered three books from Amazaon about unusual families. 

Priscilla Gilman's The Anti-Romantic Child: A Memoir of Unexpected Joy. 

Andrew Solmon's Far From the Tree: Parents, Children and the Search for Identity

Bruce Feiler's The Secrets of Happy Families: Improve Your Mornings, Rethink Family Dinner, Fight Smarter, Go Out and Play, and Much More