A bear almost gives up his search for his missing hat until he remembers something important.

Biscuit the dog helps reunite a lost teddy bear with its owner.

The reader is asked to help Nate the Great solve the mystery of his friend Annie's missing dog Fang.

At school before Parents' Day, Nancy and Bree are on the case when a prized possession goes missing, and Nancy decides to make her guitar teacher and her favorite babysitter fall in love on Valentine's Day.

When a wolf cub and little girl are lost in a snowstorm they must find their way home.

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.

At Green Lawn Elementary, the entire school becomes involved in a mystery when Mr. Bones, the skeleton in the nurse's office, disappears.

When Emma's little brother Jake looks after the neighbor's dog in preparation for getting his own puppy, the pet goes missing and Emma and the rest of the girls have to find it before the owner comes home.

After being noticed by songbird Serenade, Pinkie Pie is offered a spot as a backup dancer for the famous pop star, but when things go missing during rehearsals it's up to Pinkie Pie to track down the culprit.

Delighted when her parents allow her to adopt a goldfish, young Lainey wonders if she has made a mistake when she attempts to bring her new pet to Never Land.