code and cipher stories

Geronimo Stilton sets out to crack the secret hidden in Mouse Island's most famous painting, the Mona Mousa; and in the second story, Geronimo and his grandfather pack up the cheese-colored camper and travel to a remote spot on the island so Grandfather could write his travel book.

Using their code-breaking skills, four middle-schoolers solve the mystery of the eccentric man who draws stick figures on his second-floor bedroom window.

A crime wave has hit Archer's Grove and Maddison disovered the secret in her father's past, and a cold case has changed from "missing" to murder.

Chris and Carrie Kingsolver have the location of the lost tresure ship San Telmo, and are off to find it with Professor Griffin and two sketchy grad students, meanwhile, Maddison's dad has dragged her off to Nebraska to consult a detective about the disappearance of an old college friend, and the FBI is going door to door.

While in her second year at Explorer Academy, Sailor discovers her older sister's sudden disappearance may be linked to an illegal and deadly animal-trafficking ring and must choose to embrace her destiny to find the truth.

"Forty years ago, Steven Smith found a copy of a famous children's book by disgraced author Edith Twyford, its margins full of strange markings and annotations. Severely dyslexic and wanting to know more, he took it to his remedial English teacher Miss Iles, not realising the chain of events that he was setting in motion. Miss Iles became convinced that the book was the key to solving a puzzle, and that a message in secret code ran through all Twyford's novels. Then Miss Iles disappeared on a class field trip, and Steven has no memory of what happened to her. Now, out of prison after a long stretch, Steven decides to investigate the mystery that has haunted him for decades. Was Miss Iles murdered? Was she deluded? Or was she right about the code? And is it still in use today? Desperate to recover his memories and find out what really happened to Miss Iles, Steven revisits the people and places of his childhood. And as he does so, he records the story of his life in the form of voicemails and voice memos for his estranged and long unknown son, a professor of mathematics. But it soon becomes clear that Edith Twyford wasn't just a writer of forgotten children's stories. The Twyford Code is valuable, and he isn't the only one trying to solve it"--Provided by publisher.

"Still reeling from the life-changing discovery he found buried in the mysterious archive, Cruz Coronado grapples with an important secret as the gang heads to China in search of the second-to-last piece of the cipher. Under the watchful eye of a new adviser, life on the ship returns to almost normal . . . Almost. Just as things seem to be going smoothly, a familiar face shocks Cruz back into reality, and the final piece in this life-and-death scavenger hunt veers toward a dead end"--Publisher.

"Billie and the Secret Mystery Club have found a mysterious note - in code! What does it say? And who could have sent it? One thing's for certain: it will take all the skills of the SMC to solve this mystery..."--Page [4] of cover.

Kit Sutherland moves to Washington, DC to work as an codebreaker at Arlington Hall, but when she stumbles onto a bloody homicide scene, she joins forces with other girl codebreakers to find the man killing Government girls.