Critical - Robin Cook

New York City medical examiners Laurie Montgomery and Jack Stapleton return in this stunning novel from the "master of the medical thriller" (New York Times)—a ripped-from-the-headlines tale of an innovative doctor's dangerous downward spiral.
After a rough climb to the top, doctor and businesswoman Angela Dawson appears to have it all: a start-up—Angels Healthcare—that's about to go public, and a controlling interest in three busy specialist hospitals in New York City as well as plans for others in Miami and Los Angeles. But then a surge of drug-resistant staph infections in all three hospitals devastated her carefully constructed world...
NYC medical examiners Laurie Montgomery and Jack Stapleton are naturally intrigued by the uptick in staph-related post-procedure deaths at these hospitals. Aside from their professional curiosity, there's a personal stake as well: Jack is facing surgery to repair a torn ACL at Angels Orthopedic Hospital.
Despite Jack's protests, Laurie can't help investigating—thus opening a Pandora's box of corporate intrigue that threatens not just her livelihood, but both of their lives as well.