Fan-favorite detective Drew Leclair returns to crack the case of a sneaky locker thief in this heartfelt sequel to the critically acclaimed middle grade mystery series that's been called "the perfect story for readers ready to progress from Nancy Drew." (SLJ, starred review). After breaking school rules the last time she solved a mystery, Drew Leclair has a new mission: get good grades, stay under the radar, and do not get suspended. But when Drew finds out that there's a thief breaking into the P.E. lockers and leaving behind cryptic ransom notes, it's hard to resist cracking a new case. Especially when one of the victims is her best friend Shrey's crush, and he's practically begging her to get involved. Can Drew catch the thief red-handed while staying out of trouble? And what does it mean when everyone around Drew is obsessing over crushes and the upcoming Wonderland dance, and Drew would rather work on her latest crime board?

In this modern take on Harriet the Spy, twelve-year-old Drew uses her true crime expertise to catch the cyberbully in her school--only to discover that family, friendship, and identity are the hardest mysteries to solve. Drew Leclair knows what it takes to be a great detective. She's pored over the cases solved by her hero, criminal profiler Lita Miyamoto. She tracked down the graffiti artist at school, and even solved the mystery of her neighbor's missing rabbit. But when her mother runs off to Hawaii with the school guidance counselor, Drew is shocked. How did she miss all of the clues? Drew is determined to keep her family life a secret, even from her best friend. But when a cyberbully starts posting embarrassing rumors about other students at school, it's only a matter of time before Drew's secret is out. Armed with her notebooks full of observations about her classmates, Drew knows what she has to do: profile all of the bullies in her grade to find the culprit. But being a detective is more complicated when the suspects can be your friends. Will Drew crack the case if it means losing the people she cares about most?