Nancy's search for ninety-nine steps leads her to Paris and an exciting adventure in blackmail and alchemy.

Through Tanzania and Zanzibar, into the rainforests of Madagascar, and across the Indian Ocean to Indonesia and the legendary site of the 1883 Krakatoa explosion, husband-and-wife treasure-hunting team Sam and Remi Fargo and their ruthless opponents pursue the hunt for a relic--but only one can win. And the penalty for failure is death.

"They may seen an unlikely gang of friends, but when they spot a ghostly figure walking the beach one winter's evening, they are thrown together to unravel a mystery that none of them expected. The deeper they dig, the bigger the adventure becomes--motorboats, tracking devices, bedroom breakouts and daring sea rescues are all in a day's work for the After-School Detective Club. And when their investigation leads them into trouble with the police,...

It all started when my sister, Thea, discovered a mysterious map. It showed a secret treasure on a faraway island. And before I could let out a squeak of protest, Thea dragged me into her treasure hunt! In no time at all, we'd set sail for the island. It was an adventure I'd never forget....

After capsizing her rowboat on Twin Lakes, Nancy Drew sets out to help the girl who saved her life investigate the mysterious events surrounding a deserted bungalow.

Nancy Drew becomes involved in a double mystery concerning a haunted bridge and jewel thieves.

The Hardy boys dial a wrong number, get the Pentagon, and suddenly find themselves in a dangerous adventure involving national security.

"On a NUMA training mission in the Caribbean, Kurt Austin and Joe Zavala catch a distress call from a nearby freighter. Leaping into action, they locate a damaged vessel and a dead captain clutching a shotgun. While searching the freighter for clues, Kurt and Joe are ambushed by crew members who seem terrified and disoriented, almost brainwashed. The trawler they were hauling has vanished, taken--the men say--by baffling lights that circled the ship....

Tor Kelsey, an undercover security operative for the British Jockey Club, is assigned to protect guests on "The Great Transcontinental Mystery Race Train," individuals whose safety is imperiled by real-life murder and mayhem.

"After saving the world, Charlie is ready to take it easy in the Galapagos Islands. That is, until she's approached by the mysterious Esmeralda Castle, who has a code she knows only Charlie can decipher. In 1835, Charles Darwin diverted his ship's journey so he could spend ten months in South America on a secret solo expedition. When he returned, he carried a treasure that inspired both awe and terror in his crew. Afterward, it vanished, never to...