The fertile mind of Leonardo da Vinci gave so much to the world; he was an artist, engineer, inventor, anatomist, geologist cartographer and more. He drew sketches and plans of many objects that would not be practically assembled for many centuries after his death, and his scientific approach to research was ahead of its time. His personal life was shrouded in mystery and many of his works are reputed to hold all sorts of secrets in the form of codes and puzzles. This book takes inspiration from hundreds of paintings, sketches, diagrams and writings to provide more than 150 puzzles and enigmas. Spot-the-difference, logic reasoning, riddles, codebreaking challenges and more are all beautifully illustrated with drawings, sketches, paintings and diagrams in the style of the master himself.