On Butterfly Island, sailer Stout Sam and his deckhand Pip must rescue their treasure-sniffing pig from nasty pirate Barracuda Bill.

When an ancient ring is discovered on Clamerkin Island, everyone starts digging for lost treasure... turning the animals' lives upside down. Can Amy help them without revealing the secret of her magic necklace?

There's a storm brewing over Eerie-on-Sea, and the fisherfolk say a monster is the cause. Someone has woken the ancient Gargantis, who sleeps in the watery caves beneath this spooky seaside town where legends have a habit of coming to life. It seems the Gargantis is looking for something: a treasure stolen from her underwater lair. And it just might be in the Lost-and-Foundery at the Grand Nautilus Hotel, in the care of one Herbert Lemon, Lost-and-Founder....

Young Mildred Hubble, an apprentice witch with a reputation for being the worst student at Miss Cackle's Academy for Witches, smuggles her cat Tabby on a class trip to Gloomy Cove with unexpected results.

The Ghastly McNastys love treasure as much as they hate children. So when the pirates hear that Captain Syd's lost treasure is (definitely, maybe) buried in Little Snoring Castle, where a pirate movie is being filmed, they pose as extras to gain access to the castle...and the treasure.

Zane is itching for an adventure that will take him away from his family's boarding house in Rockaway, Queens. So when he is entrusted with a real treasure map, leading to a spot somewhere in Manhattan, Zane wastes no time in riding the ferry over to the city to start the search with his friends Kiko and Jack and his dog, Hip-Hop. Through strange coincidence, they meet a man who is eager to help them find the treasure: John, a sailor who knows all...

"A rumor that Blackbeard's buried treasure is somewhere near Tupelo Landing causes pirate fever to sweep through town just as clues about Mo's Upstream Mother surface and the Desperado Detectives--aka Mo LoBeau and her best friends Dale and Harm--take on the most important case of Mo's life"--

Geronimo Stilton's ancient ancestor is back in another prehistoric adventure! A mysterious rodent has been shipwrecked on Mouse Island. He's a prehistoric pirate, and he's searching for a lost Stone Age treasure! Geronimo Stiltonoot and his family volunteer to help him on his dangerous hunt. Petrified cheese! Can they find the treasure without going extinct on the way?

Seventh-graders Sloane and Amelia are devastated to be paired for a research project about long-lost jewels, but soon they are finding clues hidden for nearly a century--and realize they are being used.