Ken Irvine started collecting mechanical puzzles over 4 decades ago. After several decades, his wife kept insisting that he create his own puzzle. Thus was the inspiration for his first puzzle, The Nagging Wife.
Since then, he has created over 50 designs. One of his puzzles, Trifecta, even won a Top-10 award at the International Nob Yoshigahara Puzzle Design Competion in 2015.
Mr. Irvine is also the author of the ZenPuzzler blog at ZenPuzzler.com.
