The code —Lerangis, Peter.

For twelve-year-old twins Andrew and Evie, moving is a way of life. Their dad is in the military, and they've never stayed in one place for long. But relocating has gotten harder since their mother disappeared on the twi...

The multiplying mysteries of Mount Ten —Van Dolzer, Krista, author.

When twelve-year-old painter Esther gets stuck at math camp rather than art camp, she is determined to prove herself but someone leaves cryptic messages intended to drive her away.

Badlands : a novel of suspense —Montanari, Richard.

Philadelphia detectives Kevin Byrne and Jessica Balzano match wits with a deranged killer who is using the streets of the city as his own personal killing ground.

Storm warning —Park, Linda Sue.

"Amy and Dan hit the high seas as they follow the trail of some infamous ancestors to track down a long lost treasure. However, the real prize isn't hidden in a chest. It's the discovery of the Madrigals' most dangerous ...

Enigma : a magical mystery —Base, Graeme.

When Bertie the badger visits his grandfather at a retirement home for magicians, he learns that his grandfather's rabbit, Enigma, has disappeared along with everyone's magical things, and the reader is invited to help b...

The book of fate —Meltzer, Brad.

"A two-hundred-year-old code devised by Thomas Jefferson becomes the key to a present-day conspiracy at the highest levels of Washington and the power elite of Palm Beach"--Provided by the publisher.

Solving Zoe —Dee, Barbara.

Zoe's sixth-grade year at a Brooklyn school for gifted students is marked by changing relationships with her fellow students and teachers, recognition of her talent for cryptography, and a greater awareness of her passio...

The black circle —Carman, Patrick.

In the first 39 Clues book, Amy and Dan Cahill discovered that they're part of one of the most powerful families in human history. Passing up the hush money, the siblings set out to uncover the 39 clues which would revea...

The black circle —Carman, Patrick.

The dead of night —Lerangis, Peter.

The Romeo and Juliet code —Stone, Phoebe, 1947-

During World War II, eleven-year-old Felicity is sent from London to Bottlebay, Maine, to live with her grandmother, aunt, uncle, and a reclusive boy who helps her decode mysterious letters that contain the truth about h...

The arms maker of Berlin —Fesperman, Dan, 1955-

Salem's cipher —Lourey, Jess, 1970- author.

Devils in daylight —Tanizaki, Jun'ichirō, 1886-1965, author.

"One morning, Takahashi, a writer who has just stayed up all night working, is interrupted by a phone call from his old friend Sonomura: barely able to contain his excitement, Sonomura claims that he has cracked a secret...

The lady in blue : a novel —Sierra, Javier, 1971-

In Los Angeles, Jennifer Narody is having a series of disturbing dreams involving eerie images of a lady in blue. She doesn't know that this same spirit appeared to leaders of the Jumano Native American tribe in New Mexi...

Beyond the grave —Watson, Jude.

A clue found in Book 3 sends Amy and Dan to find out what's behind the fierce rivalry between the Tomas and Ekaterina branches of the Cahill family. Was a clue stolen from the Tomas branch? Where is it now? And most impo...

Lu & Clancy's secret languages —Dickson, Louise, 1959-

The Jefferson key : a novel —Berry, Steve, 1955-

The Alexander Cipher —Adams, Will, 1963-

"A debut, rip-roaring archeological thriller about the search for the lost tomb of Alexander the Great "--Provided by the publisher.

Double or die —Higson, Charles, 1958-

Young James Bond must take a series of dangerous gambles to decipher a code that will save a kidnapped professor.