When Fairies Go Bad
Ursula Vernon
Danny's mother has disappeared into a fairy ring growing in her backyard vegetable garden, and Danny and his friends, Wendell and Christiana, must go to Faerie to try to save her.

by Geronimo Stilton (2006)
Be ready to take a trip to one of the most endangered temples! If you are lucky enough you may find some friends and if you are more lucky enough you may find a RUBY! BUT be careful there's a TRAP!
Ursula Vernon
Danny's mother has disappeared into a fairy ring growing in her backyard vegetable garden, and Danny and his friends, Wendell and Christiana, must go to Faerie to try to save her.
Rachelle Delaney
"The Lost Souls have protected the famous treasure on Island X from the pirates. But now, a mysterious predator is prowling around their camp: a ferocious black panther. And with Captain Scarlet McCray stuck in Port Aberhard learning how to be a proper lady, Jem Fitzgerald is left to command the crew, protect the treasure, and keep tabs on both the panther and a new pirate captain, determined to best every pirate in the Islands"--