If you are looking to learn how to solve just about any puzzle, the QiYi Secret Tutorial Book is an amazing resource! This compact, travel-friendly book contains tutorials for: 2x2, 3x3, 4x4, 5x5, 6x6, 7x7, megaminx, skewb, pyraminx, ivy cube, 2x2x3, mirror cube, mastermorphix and square-1!