Suzy Kline has written thirty-five previous Horrible Harry books. She is also the author of numerous popular children's books, including the Orp books and the Herbie Jones series. She taught elementary school for twenty-seven years and now does scores of school visits in addition to her writing.
Amy Wummer has illustrated many children's books, including the Marvin Redpost series by Louis Sachar and a number of previous books in the Horrible Harry series. She and her husband live in Reading, Pennsylvania, with their three children.

Horrible Harry says goodbye in the 30th anniversary finale of a beloved series!
The last day of third grade is approaching fast, but a farewell to Room 3B isn't the only goodbye Doug has to say this year. Song Lee and Mary are busy preparing an end-of-year present for their favorite teacher, Mrs. Flaubert, but their excitement can't distract Doug from Harry's suspicious silence. When Harry finally admits that his family is moving to a whole other town, Doug can't believe his ears. How will he survive fourth grade without his best friend?! But Harry has a more pressing question: who's that moving in to the empty house across the street from him? And what could these new neighbors mean for their friendship?