Marcel Danesi, PhD, is a full professor of linguistic anthropology and the director of the program in semiotics at the University of Toronto. He is also co-director of the CogSci Network of the Fields Institute for Research in Mathematical Sciences. He has written extensively on puzzles, including The Anthropology of Puzzles (Bloomsbury, 2018) and Ahmes' Legacy: Puzzles and the Mathematical Mind (Springer, 2018). He also writes a puzzle blog for Psychology Today and composes puzzles for various magazines, including Prevention and Reader's Digest.