"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...

Bear's animal friends come to his rescue when he becomes lost and frightened in the woods.

When Arthur and Buster try to take the bus to Arthur's swimming lesson, they fall asleep and end up in a strange part of town.

A little fish thinks he can get away with stealing a hat.

Still looking for a place to hibernate, Papa Bear follows Baby Bear to a cruise ship, and winds up on a tropical island.

When a little girl from the human world becomes lost in the magical Realm, Jessie's only hope of finding her is the wand of a brilliant but reclusive magician, and if she succeeds she must still face Mrs. Tweedie, who is up to no good.

As a mother duck leads her ducklings home, one dawdles and is left behind but, luckily, a friend is there to help the little duckling back to his nest in time for bed.

After Trixie and daddy leave the laundromat, something very important turns up missing.

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

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.