Kathleen A. Duffy is a nurse, wife, mother of three, and grandmother to four boys. The “Charlie” books are based on her relationship and adventures with her dear friend of more tha...view moreKathleen A. Duffy is a nurse, wife, mother of three, and grandmother to four boys. The “Charlie” books are based on her relationship and adventures with her dear friend of more than twenty-seven years … the real-life, human Charlie.view less