A breakthrough that could destroy the usefulness of DNA databases throws a scientist and an FBI agent into a safe house in Jessica Andersen's complicated Twin Targets (4). Trying to help her dying twin sister, scientist Sydney Westlake agrees to work for a man she soon discovers is a monster with designs on her project. Suspicious FBI agent John Sharpe rescues the fleeing Sydney, but he's not sure he believes she's innocent. Throwing her in a safe house, John's not only fighting the potential terrorist but his own attraction to a possible suspect. Andersen's DNA explanations may be complicated, but the action and suspense are straightforward and will leave readers breathless.