In the tradition of Sir Arthur Conan Doyle's Sherlock Holmes stories, this mystery by the author of the Winnie-the-Pooh book is set in the English countryside in a stately British mansion with an abundance of characters and curious clues.

At a high school party, a girl finds her best friend murdered, only to be discovered holding the weapon and accused of the crime.

In Iowa circa 1929, spunky twelve-year-old Tugs vows to turn her family's luck around, with the help of a Brownie camera and a small-town mystery that only she can solve.

Twins Ashley and Bryce face their toughest challenge yet when the terrorist responsible for their father's death seeks revenge against their stepfather, a government agent, and targets schools, beginning with theirs.

With the help of his nursery rhyme friends, Little Boy Blue, who now runs a detective agency, solves the mystery of the missing Miss Muffet.

Alice's father invites twelve-year-old Maisie and her dog Eddie to join Alice on a trip to the country, but the manor her father has rented seems to be haunted, terrifying Alice and putting Maisie's detecting skills to the test. Includes quizzes, activities, and more.

Thirteen-year-old Q and fifteen-year-old Angela expect their lives to become complicated when his mother and her father, wildly popular musicians, marry, but not that they will face spies and terrorists in Philadelphia, Pennsylvania.

Before returning to Wellsworth, twelve-year-old Emmy receives a letter from her father telling her to trust no one, but the Order is up to no good and she will need help to stop them.

After the death of his ex-girlfriend Carly, northern California high school student Neily joins forces with Carly's cousin Audrey to try to solve her murder.

Former best friends Hanna, Aria, Spencer, and Emily, who lost their best friend and leader, Alison, years ago when she disappeared, find themselves in grave danger when they pursue the truth about Alison.