A #1 New York Times Bestselling Author
A Captain Chase Novel

On the eve of a top-secret space mission, Captain Calli Chase � a NASA pilot, quantum physicist, and cybercrime investigator � detects a problem in the tunnels below a NASA research center. She discovers dried blood, a missing security badge, and a suspicious suicide. This series of disturbing clues point to Calli�s twin sister, Carme, who�s been missing for days. Desperate to avoid disaster and clear her sister�s name, Captain Chase races to find answers for her twin�s erratic conduct. But time is running out, and she realizes that failure means catastrophe � for both the space program and the safety of the entire nation.