Essentially there are two types of puzzles: logical (left brain) puzzles which require analytical thinking to solve and non-logical (right brain), "lateral-thinking" puzzles, that are best solved using intuition. It has been found that most people have a distinct preference when it comes to thinking styles: not always a good thing when it comes to attempting certain puzzles!
Perfect Pitch is a wonderful coffee table puzzle that requires both left and right thinking. Its relatively simple appearance masks its slightly more sinister nature. Creative thinkers, who have a better ability to see things as a whole rather than a sum of their parts, should have more success solving this puzzle.