Clayton Walnum started programming computers in 1982, when he traded an IBM Selectric typewriter to buy an Atari 400 computer with 16K of RAM. He was hired as a Technical Editor for Atari 8-bit computer magazine ANALOG Computing in 1985, eventually becoming Executive Editor before leaving in 1989, the year the publication folded. He authored a number of type-in games for ANALOG, including Dragonlord (1985) and Moonlord (1986), mostly written in Atari BASIC.
Walnum has since acquired a degree in computer science, and written over 30 books (translated into many languages). He is also the author of hundreds of magazine articles and software reviews, as well as countless programs.