While playing cards in the great entrance hall of a castle, four friendly ghosts hear noises in the cellar that cause them to make a shocking discovery.

"It started out to be a simple visit to a sick old aunt, but strange things were happening at the rundown house. Could it be haunted?" Spooky things are happening in Aunt Matilda's house. Potato chips on the floor are spelling out secret messages and forming trails. And if Aunt Matilda is snoring in her bed, then who is whistling a tune? There must be a ghost in Aunt Matilda's house.

After Andres discovers a haunted bike park, he calls his best friend Desmond, a ghost investigator.

When a team of feline ninjas descends upon the animal town of Pawston and the sacred scroll of Bark-Jitsu disappears, Sensei, a skilled martial arts sea otter, asks Westie and the rest of the Pup Investigators to investigate.

While visiting New York's Yankee Stadium with Kate's mother, cousins Mike and Kate decide to investigate the rumor that the ghost of Babe Ruth is haunting the stadium.

It's not easy to enjoy a picnic when you have unseeable interlopers to contend with! In a new trio of stories for beginning readers, the affable Max the dog and mischievous Baby Cakes the cat encounter a scare-happy ghost who has a run-in with a mirror, the wind at its blustery best, and a teeny-tiny fairy with a wayward wand who may have met her match. --

"Fresh off the excitement of the Night Hunt, Ruskin, Cinder, Groth, and Roke set out for a camping trip on Ghost Island, which, according to Groth, is definitely not haunted despite its name"--

"Describes stories about ghosts and explores whether ghosts exist or not"--Provided by publisher.

During a slumber party, Anna, Elsa, and Olaf hunt for ghosts in the castle.

Jack and Annie must travel back in time to New Orleans in 1915 to help a teenaged Louis Armstrong fulfill his destiny and become the "King of Jazz."