Theresa Schwegel's first novel, "Officer Down," won the Edgar for Best First Novel. Then "Person of Interest," her third, marked new reaches of critical acclaim and commercial success, and also signified an exciting shift in scope as she tackled in equal parts the personal as well as the professional lives of her cop characters. <p>Now in "Last Known Address," Chicago Detective Sloane Pearson is still new to the Sex Crimes Division, but she's tired of being treated like the new girl by the guys who've been around. She's tracking a rapist who strangles women nearly to death, usually on deserted building sites and in vacant apartments, which are peppered all over downtown Chicago. The baffling case intensifies when one of the victims turns out to be Sloane's realtor, making the investigation more personal than ever. <p>To make matters worse, Sloane's father's failing health is a major distraction, and when he takes a turn for the worse, she throws herself into the chase. But it's getting harder; one by one the rape victims become reluctant to relive their horrors in court, and her bosses threaten to shut down the investigation altogether. Then when an impromptu sting puts Sloane herself in danger, even her partner backs away from the case. But she refuses to give up. Racing from the worst slums of Chicago's west side to the glittering Loop skyscrapers, Sloane tries to catch a predator before it's too late.