At first it just looks like a spiraling doodle of wavy lines—but start filling in those lines, and a picture begins to emerge. The puzzle master who brought us Querkles and marathon dot-to-dot portraits introduces Spiroglyphics, a new way to discover a hidden picture. Once colored in, each little bump in the line becomes part of the picture, not unlike the grooves in a vinyl record, and appropriately enough, the portraits here are of pop icons like David Bowie, Tina Turner, Prince, Madonna, and Elvis. And you don't have to worry about being too careful—not only are the lines forgiving of mistakes, but there are many different ways you can make these Spiroglyphics your own.