Beth McMullen. Original Sin: A Sally Sin Adventure (2011) 291 pp.
Authors website description: On the surface, Lucy Hamilton looks just like all the other stay-at-home San Francisco moms. She takes her three-year-old son, Theo, to the beach, to the playground, and to the zoo. She folds laundry and plays on the floor with Matchbox cars until her knees ache. What no one knows about Lucy, not even her adoring husband, is that for nine years Lucy was Sally Sin, a spy for the United States Agency for Weapons of Mass Destruction. And thats just the way Lucy wants to keep it—a secret. But when Lucys nemesis Ian Blackford, a notorious illegal arms dealer, hits the USAWMDs radar, the Agency calls Lucy back to action to lure Blackford out into the open. As Lucy races to unravel the mystery that surrounds Blackfords return, she realizes that the answers she needs lie in a past shes tried very hard to forget. With the clock ticking, Lucy must fight to save herself and her loving family—and, oh yes—the world.
Setting: San Francisco