Clifford Stoll
Clifford Paul "Cliff" Stoll (born June 4, 1950) is an American astronomer and author. He is best known for his pursuit of hacker Markus Hess in 1986 and the subsequent 1989 book, The Cuckoo's Egg, which details his investigation. Stoll has written a total of three books as well as technology articles in the non-specialist press (e.g., in Scientific American on the Curta mechanical calculator and the slide rule).