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

During Spring Break, mystery lover Amy looks for clues to the disappearance of wealthy Ms. Sullivan's Saint Bernard puppy.

When Adele walks her little brother Simon home from school he loses one more thing at every stop: his drawing of a cat at the grocer's shop, his books at the park, his crayons at the art museum, and more. When Simon's older sister, Adele, picks him up from school, he has his hat and gloves and scarf and sweater, his coat and knapsack and books and crayons, and a drawing of a cat he made that morning. Adele makes Simon promise to try not to lose anything....

Nate and his dog Sludge are determined to find the recipe for his mother's monster cookies.

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

"Wordless picture book about a boy who loses his paper boat in the rain"-- Provided by publisher.

The reader is invited to help Duck and his animal friends find a missing item.

A young boy encounters a lion while trying to find his pet cat--meeting a number of other animals along the way.

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.