Dr. Dennis Shasha is a professor of Mathematical Sciences in the Department of Computer Science at NYU. Along with research and teaching in biological computing, pattern recognition, database tuning , cryptographic file systems, and the like, Dennis is well-known for his mathematical puzzle column for Dr. Dobbs whose readers are very sharp and his Puzzling Adventures Column for the Scientific American. His puzzle writing has given birth to fictional books about a mathematical detective named Dr. Ecco. Dr. Shasha has also co-authored numerous highly technical books. Dennis speaks often at conferences and is a tireless self-promoter in the world of “mensa-like” puzzles.