Washoe County Library System

Four women who worked as codebreakers at Bletchley Park have taken up civilian lives. Susan has collated data about a series of murders. She tries to convince the police she knows where another body is, but they are unable to locate it and dismiss her. She turns to her three friends and they work out where the next victim will be taken, find the body, and then decide they are the only ones who can track down the killer.

When a mysterious letter written in code arrives at King's house for his human, Kayla, he follows the trail of the person who left it.

Told in multiple voices, fifteen-year-old Jamaican Louisa Adair uncovers an Enigma machine in the small Scottish village where she cares for an elderly German woman, and helps solve a puzzle that could turn the tide of World War II.

Charlie, Anna, and Emily must overcome their differences and work together to solve various puzzles leading to the secret treasure a famous female explorer left in Idlewood Manor before the adults do.

After seven members of their family are kidnapped by a organization called the Vespers, Dan and Amy Cahill must race against time to track down an ancient map to pay as ransom to bring the hostages home.

Lady Daphne Forsyth is a brilliant mathematician with a burning passion for puzzles. When she learns that the library belonging to her benefactress houses the legendary Cameron Cipher--an encrypted message that, once solved, holds the key to great riches--Daphne is on the case. Unfortunately, her race to unlock the cipher's code is continually thwarted by a deliciously handsome distraction she hadn't counted on...and cannot resist. Dalton Beauchamp,...

It was only a few weeks ago that the Biedermann twins, Tess and Theo, along with their friend Jaime Cruz, followed the secrets of the Morningstarrs' cipher further than anyone had in its century-and-a-half history -- and destroyed their beloved home in the process. But the Old York Cipher still isn't solved. The demolition of 354 W. 73rd Street only revealed the next clue in the greatest mystery of the modern world, and if Tess, Theo, and Jaime want...