Dr. Toby Harper works the night shift in an emergency room. She spends her daytime hours alone with her mother who suffers from Alzheimer's disease. When elderly Alzheimer's patients from the same retirement home start dying mysteriously, Toby is the only one suspicious enough to investigate. As a result she finds herself, her mother, and her own sanity at risk.

In Harvest, the book that introduced us to Tess Gerritsen's unique blend of medical expertise, harrowing suspense, and brilliantly crafted plot twists, the dark side of medical research is exposed. Harvest vividly portrays a young woman doctor challenging a world where medical miracles and greed fuel a lethal conspiracy - and the bright lights of the O.R. conceal the ultimate corruption of genius.

Julia Hamill has made a horrifying discovery on the grounds of her new home in rural Massachusetts: a skull buried in the rocky soil � human, female, and, according to the trained eye of Boston medical examiner Maura Isles, scarred with the unmistakable marks of murder.

Emma Watson, a brilliant research physician, has been training for years for the mission of a lifetime: to study living beings in space. Jack McCallum, Emma's estranged husband, has shared her dream of space travel, but a medical condition has grounded and embittered him. He must watch from the sidelines as his wife prepares for her first mission to the international Space Station.

She's young. She's beautiful. And her corpse, laid out in the office of Boston medical examiner Cat Novak, betrays no secrets - except for a notebook clutched in one stiff hand, seven numbers scrawled inside. When a second victim is discovered, Cat begins to fear that a serial killer is stalking the city streets: a shadowy madman without mercy or apparent motive. The police are sceptical. The mayor won't listen. And Cat's chief suspect is one of the city's most prominent citizens.

Former spy Maggie Bird came to the seaside village of Purity, Maine, eager to put the past behind her after a mission went tragically wrong. These days, she’s living quietly on her chicken farm, still wary of blowback from the events that forced her early retirement. But when a body turns up in Maggie’s driveway, she knows it’s a message from former foes who haven’t forgotten her. Maggie turns to her local circle of old friends—all retirees from the CIA—to help uncover the truth about who is trying to kill her, and why.

Taryn Moore is young, beautiful, and brilliant…so why would she kill herself? When Detective Frankie Loomis arrives on the scene to investigate the girl’s fatal plunge from her apartment balcony, she knows in her gut there’s more to the story. Her instincts are confirmed when surprise information is revealed that could have been reason enough for Taryn’s suicide - or a motive for her murder.

He slips into their homes at night and walks silently into bedrooms where women lie sleeping, unaware of the horrors they soon will endure. The precision of the killer's methods suggests he is a deranged man of medicine, propelling the Boston newspapers and the frightened public to name him "The Surgeon". The cops' only clue rests with another surgeon, the victim of a nearly identical crime. Two years ago, Dr. Catherine Cordell fought back and killed her attacker before he could complete his assault.

Miranda Wood thought she had seen the last of Richard Tremain, her rich and married ex-lover - until she discovered him stabbed to death in her bed...with her knife. With her world falling around her, Miranda is determined to clear her name and discover who killed Richard. But proving her innocence may become secondary to staying alive.

The quiet scandal surrounding the death of her parents has always haunted Beryl Tavistock. Now she’s asking dangerous questions, and the answers are proving that the past does not die easily. Pulled into a world of espionage, Beryl quickly discovers that she needs help, and former CIA agent Richard Wolf is her only hope. But in a world where trust is a double-edged sword, friends become enemies and enemies are killers.

Dr. Carrie Bryant's four years as a neurosurgical resident at White Memorial Hospital have earned her the respect and admiration from peers and staff alike. When given the chance of performing her first unsupervised brain surgery, Carrie jumps at the opportunity. What should have been a routine, hours-long operation turns horribly wrong and jeopardizes her patient's life. Emotionally and physically drained, Carrie is rushed back to the OR to assist in a second surgery.

When President Geoffrey Hilliard’s son Cam, a 16-year-old chess champion, experiences extreme fatigue, moodiness, and an uncharacteristic violent outburst, doctors are quick to dismiss his troubles as teen angst. But Secret Service agent Karen Ray summons her physician ex-husband for a second opinion. Dr. Lee Blackwood’s concerns are dismissed by the president's team - until Cam gets sicker. Lee must make a diagnosis from a puzzling array of symptoms he's never seen before. His only clue is a patient named Susie Banks, a young musical prodigy who seems to be suffering from the same baffling condition as Cam.

Newly minted chief resident at Boston Memorial Hospital Noah Rothauser is swamped in his new position, from managing the surgical schedules to dealing with the fallouts from patient deaths. Known for its medical advances, the famed teaching hospital has fitted several ORs as "hybrid operating rooms of the future" - an improvement that seems positive until an anesthesia error during a routine procedure results in the death of an otherwise healthy man.

Former movie star Jenna Hughes left Hollywood for an isolated farm in Oregon to get away from fame. But someone has followed her - an obsessed fan whose letters are personal and deeply disturbing. And while Jenna's already shaken up by what she's seen on paper, she'd be terrified if she knew what Sheriff Shane Carter is investigating. It's a shocking case that started with the discovery of a dead woman in the woods. Now two more women are missing, one of whom bears a striking resemblance to Jenna...

Called in to examine what is left of a person thought to have been struck by lightning, Tempe traces an unusual tattoo to its source and is soon embroiled in something much larger. Young men—tourists—have been disappearing on the islands of Turks and Caicos. Seven years earlier, the first victim was found in a strange location with his left hand hacked off; subsequently, two other visitors vanished without a trace. But recently, tantalizing leads have emerged.