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

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

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...

On the night before Christmas, Olivia discovers that her favorite stuffed monkey, Mathilda, is missing, as are other favorite items from around the house.

"When the letter B goes missing from the story, the reader must find a way to bring it back into the book for good"--

"Stella volunteers to watch best friend Evie's dog, Bella, for a few days. Disaster strikes when Bella gets loose and runs away. Stella must find her before Evie returns"--Provided by the publisher.

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.

Danny Dragonbreath and his friends try to help the senior reptiles of Sunny Acres find a lost item.

Biscuit helps reunite a lost teddy bear with its owner.

Joey Pignattano made a Halloween bet. He is going to eat a worm for a dollar. The only problem is, someone stole the worm. And the number one suspect is a mummy! It's going to take two top detectives like Jigsaw and Mila to unwrap this ooey-gooey mystery.