"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...

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

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 Pinkalicious and her friend Molly go to the Pinkville Fair, everything reminds Pinkalicious of Goldilicious and she starts to miss her unicorn. Fortunately, Pinkalicious appears with her own best friend, another unicorn.

When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

After a class trip to a floating zoo where animals are mistreated and Savannah's missing pet monkey is found in a cage, Long Island sixth-grader Griffin Bing and his band of misfits plan a rescue.

Two turtles find a hat that looks good on both of them, but, with fairness in mind, they decide to leave it be, until night falls and one of the turtles changes its mind.

Froggy and his father search the house for the mislaid items they will need on their bike trip.

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

"Amelia Bedelia loses her tooth . . . and then she loses it again. But it's finders keepers in the end"--