Our mystery author today has to tell people how to pronounce his first name, and in fact, he has the pronunciation prominently displayed on his website. Born in Ireland, this young adult author started out as a teacher. When his book about his teaching experiences in Tunisia was published in 1998, he began writing another. Before long he was able to retire from teaching and took up writing books full time. His books are consistently on the New York Times bestseller lists. Can you pronounce today’s author’s name? What book series is he best known for?