When Griffin Bing plans a spooky sleepvoer in a haunted house that's about to be demolishied, he isn't planning on making a fortune. But then he discovers something more valuable than gold: a rare Babe Ruth baseball card, hidden out fo view for many years. Griffin's on his way to a million dollars...until a mean collector named S. Wendell Palomino (a.k.a. Swindle) tricks him out of the card. Now Griffin must put together a team of friends (and one...

After the mysterious disappearance of their parents, Marty and Grace go to live with their scientist uncle and accompany him on, what soon becomes, an increasingly dangerous expedition to New Zealand to track a giant squid.

"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...

Everyone else in the village is afraid of the creature who supposedly dwells at the top of Kneeknock Rise but young Egan investigates for himself.

Ruby Redfort is a genius code-cracker, a daring detective, and a gadget-laden special agent who just happens to be a 13-year-old girl. She and her slick side-kick butler, Hitch, foil crimes and get into loads of scrapes with evil villains, but they're always ice-cool in a crisis.

While attending an amusement park under the new ownership of their friend Daisy, Joe and Frank investigate the disappearance of a patron who was last seen riding a hit attraction, an event that has threatened Daisy's family's livelihood.

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

"After investigating a series of pranks, Frank and Joe uncover evidence of the Red Arrow, a group that will stop at nothing to bring chaos and crime to Bayport."--

"Joe and Frank's winter break skiing holiday turns to horror when a series of deadly mishaps threaten their resort."--

When the daughter of Bayport's amusement park owner goes missing, Joe and Frank follow clues to find the girl and determine if her disappearance is related to that of another missing person.