The town's ten-year-old walking encyclopedia again solves ten neighborhood mysteries. The final solutions to the cases are at the back of the book, giving the reader a chance to compare his skill to that of Encyclopedia Brown.

One month before graduating from his Central Florida high school, Quentin "Q" Jacobsen basks in the predictable boringness of his life until the beautiful and exciting Margo Roth Spiegelman, Q's neighbor and classmate, takes him on a midnight adventure and then mysteriously disappears.

Mackenzie and six of her friends head out to a secluded cabin for fun, but two of them are murdered and since they are all suspects, Mackenzie launches her own investigation, revealing secrets and sins among the original seven friends.

When Kacey moves in with her estranged father and his new family, her new friend goes missing and Kacey finds herself at the center of the investigation.

"Red Kenny is on a road trip for spring break with five friends: Her best friend - the older brother - his perfect girlfriend - a secret crush - a classmate - and a killer. When their RV breaks down in the middle of nowhere with no cell service, they soon realize this is no accident. They have been trapped by someone out there in the dark, someone who clearly wants one of them dead. With eight hours until dawn, the six friends must escape, or figure...

When 7 is accused of eating 9, worried 6 hires a detective to investigate.

Elementary school detective Moxie McCoy looks for a missing school mascot and a new best friend, with the help of her annoying little brother.

When the squirrel Tail comes barreling into the chicken coop ranting about a round, shiny, green, big, scary thing in the yard, Dirt, Sweetie, Poppy, and Sugar investigate this strange object.

"A talented young soccer player in Greenfield is given the honor of being a child mascot at an international soccer tournament in Brazil, but when an anonymous letter insists that she doesn't deserve to go, the Aldens investigate"--Provided by publisher.

On a senior class camping trip, four girls find themselves lost in the woods, their supplies destroyed, and hunted by a killer.