Thomas Gifford (1937–2000) was a bestselling author of thriller novels. Born in Dubuque, Iowa, he moved to Minnesota after graduating from Harvard. After eight years as a traveling textbook salesman, he wrote Benchwarmer Bob (1974), a biography of Minnesota Vikings defensive end Bob Lurtsema. The Wind Chill Factor (1975), a novel about dark dealings among ex-Nazis, introduced John Cooper, a character Gifford would revisit in The First Sacrifice (1994). The Wind Chill Factor was one of several books Gifford set in and around Minneapolis. Gifford won an Edgar Award nomination for The Cavanaugh Quest (1976). The Glendower Legacy (1978), a story about an academic who discovers that George Washington may have been a British spy, was adapted for the film Dirty Tricks (1981), starring Elliott Gould. In the 1980s Gifford wrote suspense novels under the pen names Thomas Maxwell and Dana Clarins. In 1996 he moved back to Dubuque to renovate his childhood home. He died of cancer in 2000.