Michael Thompson is a leading child psychologist based at Harvard who conducts workshops across the United States. He is co-author of the New York Times bestseller Raising Cain. He lives in Arlington, Massachusetts. Catherine O'Neill Grace is the author of numerous non-fiction books for children. She lives in Waltham, Massachusetts.

An invitation to a birthday party; family matters - secure attachment in the first friendship; children and friendship - a developmental tour; when kids have best friends; in the jungle -the power of the group in children's lives; worst enemies - social cruelty in the lives of children; still standing - how kids manage conflict, betrayal and reconciliation; the rules of the gender game - biology and friendship; from cooties to dating; crossing the lines of difference; what schools can do; what parents can do.