Dink and his friends investigate why pets, like Mrs. Davis's canary, Mozart, are mysteriously disappearing all over town.

When her best toy mysteriously disappears, Olivia the feisty pig is determined to find out who is responsible.

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

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

Nate the Great goes to San Francisco to solve a mystery with his cousin, Olivia Sharp, who is also a detective.

Nate the Great finds mystery at the beach when Oliver's beach bag vanishes.

Thor's hammer is missing again. The thunder god has a disturbing habit of misplacing his weapon--the mightiest force in the Nine Worlds. But this time the hammer isn't just lost, it has fallen into enemy hands. If Magnus Chase and his friends can't retrieve the hammer quickly, the mortal worlds will be defenseless against an onslaught of giants. Ragnarok will begin. The Nine Worlds will burn. Unfortunately, the only person who can broker a deal for...

When she cannot find her favorite stuffed toy, a young girl asks her mother, father, and older sister for help.

Molly's parents try various methods to help her remember her mittens but nothing seems to work.

When they are separated for the first time since birth, Iris and Lark struggle with insecurities over their individual identities at the same time things begin to go missing around town.