There are lots of good resources at Prufrock Press, Great Potential Press, free spirit publishing, Magination Press.

One new book from 2013 is Asperkids Secret Book of Social Rules (http://www.amazon.com/Asperkids-Secret-Book-Social-Rules/dp/1849059152)

From 2011: Social Rules For Kids - Top 100 Social Rules Kids Need to Succeed (http://www.amazon.com/Social-Rules-Kids-The-Kids-Succeed/dp/1934575844)