This is a previously-owned “How to Solve the Cube Puzzle,” by Marko van Eekelen, an audio-cassette-tape. It plays perfectly, has been double-checked, and features all accompanying artwork. Manufactured by Gemcom in 1982, it is a retired library edition with the usual stickers and marks of former ownership. Plus, the artwork has been taped to the case. Marko Van Eekelen set the Guinness Record for solving the Rubiks Cube in 36 seconds. The Rubik’s Cube is a 3-D mechanical puzzle invented in 1974, by Hungarian sculptor and professor of architecture Ernő Rubik. As of 2009, 350 million cubes have sold worldwide, making it the world's top-selling puzzle game….
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