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Mark is a mechanical engineer living in Edmond, Oklahoma. A few years ago, he picked up one Stewart Coffin's, The Puzzling World of Polyhedral Dissections and was intrigued by the geometric puzzle designs. After unsuccessfully trying to find examples of Stewart's puzzles in stores, he decided he could make his own. He purchased what other puzzle books he could find in the book stores (mostly Jerry Slocum's) and began.Mark McCallum
5201 Bonney Drive
Edmond, OK 73034
Home Phone: +1-405-348-1784
email:
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