Operation Code-Cracker — John Townsend

Code-loving Max is unexpectedly recruited to spy on his friend's uncle, a suspected terrorist. But nothing is quite as it seems in this new world of espionage, double-crosses, kidnaps and car chases - and in the end, it may be Max's skill with word puzzles that saves the day. A thrilling, non-stop adventure packed with puzzles for the reader to solve.