Sherlock Sam and Watson are visiting a Singapore international school when a student there begins receiving suspicious letters, and Sam must use his super intelligence to help his new friend.

As her senior capstone project, Pippa Fitz-Amobi is determined to find the real killer in a closed, local murder case, but not everyone wants her meddling in the past.

Before becoming the first female private investigator in Botswana, eight-year-old Precious Ramotswe tracks down a thief who has been stealing her classmates' snacks.

Nate the Great solves the mystery of the missing picture.

The ten-year-old detective continues his war on crime in Idaville through ten more cases, for which the reader is invited to guess the solution before it is revealed.

Third-grader Dink and his detective friends hope to receive a big reward by finding the person whose video recorder picked up a picture of the local bank robber.

"Thirteen-year-old Trav feels like a fish out of water in rural Minnesota in this coming-of-age mystery about a boy who discovers his dad may have been a bank robber"-- Provided by publisher.

The Alden family rents a houseboat to drift down the river, and encounters a mystery in the little towns along the river, involving a fast black car.

After attempting to prove the existence of a famous ghost for their school newspaper, Josie, Jackson, and Alison begin to receive sinister memes on their phones and must uncover the truth behind the terrifying messages before time runs out.

Scooby and his friends investigate when a scary witch threatens their Halloween fun.