Tech-business owner Lindsey Carlisle is enjoying an evening with friends on Boston's North Shore when she receives an unexpected visit from the FBI. As the agents describe an explosion and fire at her sister Cat's home and the discovery of two bodies in the ruins, Lindsey is stunned by the news and completely unprepared for the questions that follow. Shock turns to anger as the implication becomes clear: the FBI believes her sister is connected to terrorism. Armed only with confidence in her sister's patriotism, Lindsey sets out to learn the truth. When she dives into a backup of Cat's computer and discovers a sophisticated program--one with US government fingerprints--she finds more questions than answers. Lindsey turns to friends from her sister's past, including a powerful Washington insider with ties to the White House. The revelations about Cat's life force a reevaluation of every aspect of their shared history, as seemingly unremarkable events take on a darker meaning and mounting evidence points to an imminent attack on US soil. Against a backdrop of international intrigue, LM Reynolds' Spies in our Midst paints a story pitting sibling loyalty against national allegiance, with ordinary people drawn into events requiring the most difficult choice of all: who to trust with your life.