Penny feels guilty after taking a beautiful blue marble that she sees in Mrs. Goodwin's grass, but gets a pleasant surprise when she goes to return it the next day.

When the god of thunder's hammer goes missing, Magnus Chase and his friends are tasked with retrieving it before an onslaught of giants attacks the mortal world.

When his toothbrush goes missing, Dog's friends help him look for it.

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

While fourteen-year-old Enola Holmes endeavors to save her friend Lady Cecily Alistair from an unwelcome arranged marriage, she meets with some assistance from her older brother, Sherlock, and interference by the eldest, Mycroft.

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.

"Leo isn't just a stuffed toy, he is Henry's best friend and brother. But when the two are accidentally separated, no one in Henry's family believes Leo is real enough to find his way home"--

When their most valuable loot, a big hunk of cheese, is stolen, Riff Raff and his rodent pirate gang embark on a quest to reclaim their lost treasure.

When Miata leaves on the school bus the skirt that she is to wear in a dance performance, she needs all her wits to get it backwithout her parents' finding out that she has lost something yet again.

Junie B. Jones experiences glee while showing off her new furry mittens in kindergarten, but disaster strikes when they disappear from the playground.