Gnomeo and Juliet enlist the help of Sherlock Gnomes to solve the mysterious disappearance of London's garden gnomes.

"During auditions for the show 'Pop Star Sensation' at the local mall, one of the judges, a famous pop star, disappears, and the Aldens must find out where she went"--

With just a few weeks until the wedding, Aunt Sophie's fiancé, Henry, has gone missing in the jungle. It's up to Olivia and her friends to save him. But the jungle is a dangerous place, and there's no telling what they might encounter.

When the Alden children and their grandfather visit Everglades National Park in Florida to solve the mystery of a missing ranger, they discover that a panther provides a clue.

"Dink, Josh, and Ruth Rose must solve a mystery when they go whale watching in Alaska"--

Violet, her cousin Leon, and the Pixie Tricker Sprite have a serious problem: the fairy they are dealing with now is a water sprite named Aquamarina, who is not only messing up plumbing all over town, but has made a home in a fish tank at the pet store, and has turned anyone who sees her into fish--in the water she is powerful so the three fairy-hunters must come up with a way to trick her onto dry land where she can be overcome.

"When Oliver's explorer parents go missing, he sets sail on the rescue mission with some new, unexpected friends"--

When their favorite author fails to arrive as scheduled to speak at the local library, the Alden children investigate how he could board a train and never be seen again.

"The Mouse Scouts are hitting the nature trail to earn their 'Camp Out' badge. But not all of the troopers are gung-ho about sleeping beneath the stars. When Miss Poppy goes missing, can the Scouts work together to track down their troop leader?"--

The school lunch lady, a secret crime fighter, investigates a suspicious author after he visits the school and the gym teacher goes missing.