Arriving in Brazil while dealing with squabbling family members, Geronimo Stilton must help his friend Isabela find a mysterious emerald.

While staying at the Crooked House, the family home of their housekeeper Mrs. McGregor, the Aldens try to solve a riddle that will lead them to a hidden treasure.

"A ragtag crew of misfit criminals bands together to hunt the biggest score in the galaxy in this irreverent YA sci-fi adventure"--

Ever since Tory Brennan and her friends rescued Cooper, a kidnapped wolf pup with a rare strain of canine parvovirus, they've turned from regular kids into a crime-solving pack! But now the very place that brought them together - the Loggerhead Island Research Institute - is out of funding and will have to shut down. That is, unless the Virals can figure out a way to save it!

"Saeverin and his team members might have successfully thwarted the Fallen House, but victory came at a terrible cost - one that still haunts all of them. Desperate to make amends, Saeverin pursues a dangerous lead to find a long lost artifact rumored to grant its possessor the power of God. Their hunt lures them far from Paris, and into the icy heart of Russia where crystalline ice animals stalk forgotten mansions, broken goddesses carry deadly secrets,...

Kaz, Star, Adriana, and Dante have discovered a sunken treasure ship--and nobody wants them to get near it. It will take a whole lot of ingenuity and teamwork for the kids to get back what is rightfully theirs.

New York detective John Corey, recovering from bullet wounds on an island, narrates his investigation into the murder of two scientists researching biological warfare. The two, a man and his wife, also appear to have been involved in a search for a pirate treasure. By the author of The Gold Coast.

"When Abigail Holland awakes to the sound of a nighttime intruder in her rambling Denver Victorian, she knows exactly what the black shrouded figure is after—the map she recently inherited from her grandfather. Whoever he is, the man who grapples with her, then escapes, is willing to kill for the location of a treasure King Farrell hunted for more than ten years. The Devil’s Gold has claimed hundreds of lives, and it was her grandfather’s obsession....

"People in Somerville love to trade stories about days gone by. The town's young sleuths aren't always interested, but when they hear a local legend of buried treasure, they know it's too tasty to resist. Astrid, Rowan, Quinn, and Jace set off to solve the mystery. What they discover is sweeter than they cound have imagined"--

In 1665, a British vessel named the Griffin sank with a priceless amount of gold on board. Now, centuries later, four kids are trying to raise the Griffin's treasure from the sea.