Born in Cape Town, South Africa, Adair moved to the United States in her early 20s and settled in San Francisco,[1][2] where she opened a business as an interior designer.

Adair and her husband, David, have two daughters; they keep two standard schnauzers, Max and Chase, who compete nationally in agility trials.

[citation needed] A voracious reader, she began to have story ideas of her own and transferred her creative process from interior design to writing novels, writing seventeen full books before her first novel, The Mercenary, sold to Harlequin for their Temptation line in 1994.

Recently she took first place in Barclay Gold Contemporary category for Hot Ice in 2006 and first and second in the Barclay Gold Fantasy, Future and Paranormal category with her books Edge of Danger and Edge of Fear in 2007.

[2] Adair's books have appeared on the bestseller lists of Publishers Weekly, USA Today and the New York Times.