When first-grader Roscoe discovers that his stuffed pig is missing from his backpack, he accuses the class bully of "pig-napping" and gets even by taking the bully's teddy bear.

When a weird blue chicken comes to Chicken Squad headquarters for help, siblings Dirt, Sugar, and Sweetie help find her missing house.

Penny feels guilty after taking a beautiful blue marble that she sees in Mrs. Goodwin's grass, but gets a pleasant surprise when she goes to return it the next day.

When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

While traveling with her family to Holland to visit her grandparents, Trixie once again loses her beloved Knuffle Bunny.

While fourteen-year-old Enola Holmes endeavors to save her friend Lady Cecily Alistair from an unwelcome arranged marriage, she meets with some assistance from her older brother, Sherlock, and interference by the eldest, Mycroft.

"In her chapter book debut, Nancy Clancy must find the culprit when a prized possession goes missing at school"--

Pedro forms a new club with his friends dedicated to solving mysteries--and the first two assignments are finding his mother's locket, and his father's cell phone.

When Lizzie and Gael share an irresistible challenge, to find the peacock ring that once belonged to artist Frida Kahlo, Paloma decides it is the perfect way to honor her father.

Principal Wagner confidently deals with a faculty washroom crisis, a psychic parrot, and a terrorizing gerbil, but when sixty-five erasers go missing, he enlists the help of the school's best problem solver and locator of lost items, twelve-year-old Lyle Williams, aka Mudshark.