THE ULTIMATE GIFT FOR WANNABE SPIES: AN INTERACTIVE PUZZLE BOOK FROM THE CREATOR OF THE BESTSELLING CULT PHENOMENON, JOURNAL 29! In this brain-bending interacti

Journal 29 is a unique book game where you can solve riddles and puzzles and submit your answers online to get the keys and move forward.To solve the riddles, y

A debut entry in an alternate-history series depicts three kids who try to solve a modern-world puzzle and complete a treasure hunt laid into the streets and bu

"Two epic people, love, hackers, and explosions lead to an amazing read." -- Not So Public Library Alone and on the run, Cipher doesn't talk about her secrets,

An easy-to-follow guide full of tips and examples of real-world applications. In each chapter, a thorough example will show you the concepts in action, followed