by Alexander Prezioso (Author) Math and Crypto Messages is a fun and challenging math game and puzzle. First complete all of the math problems and then use the appropriate decoding key to decrypt the secret messages. Secret messages include general facts, safety tips and positive reinforcement messages. Alexander Prezioso, the creator and author, has served over 20 years in the United States Army. He and his two sons, Brayden and Landon, developed the concept of Math and Crypto Messages while vacationing at one of their favorite vacation locations. Number of Pages: 48 Dimensions: 0.1 x 11 x 8.5 IN Publication Date: June 08, 2019