Suzy Kline has written twenty-eight previous Horrible Harry books. She is also the author of many other 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. She lives in West Willington, Connecticut.

Amy Wummer has illustrated a number of previous books in the Horrible Harry series. She lives in Reading, Pennsylvania.

The kids in Room 3B are holding a Sharing and Caring Tag Sale to earn money for charity. Song Lee and Ida are selling friendship bracelets, Doug is selling books, and Sid is selling delicious, fresh-baked chocolate chip cookies. But something else is on Harry's mind: his grandmother is having money trouble, and Harry wants to help. So he comes up with a plan to raise money for her. The problem is that Harry doesn't realize his plan involves stealing from the class's charity collection! How can Doug stop his friend from becoming a horrible thief? Could the answer come from one of Sid's delicious cookies?

“Kline is right on the mark when it comes to both her audience and her characters.”