Eight-year-old Isabel is the best-behaved girl at Crabtree School, and she has a reward chart glittering with stars to prove it. She's kind, helpful, organised, sensible...But the trouble is, no one seems to notice! Isabel's tired of nice girls finishing last. But when she does the naughtiest thing anyone in Year Three can think of, has she gone too far?

Will her friends stand by her, even at her worst moment? 6+ readers will love following the adventures of Isabel, Lottie, Zoe, Ava and Rani as they learn all about right and wrong in this third Crabtree School story.