Is there such a thing as a good sociopath? Newly minted private investigator Annalisa Vega is skeptical, but her first client, Mara Delaney, insists that some sociopaths are beneficial to society. Mara has even written a book titled The Good Sociopath centered on Chicago neurosurgeon Craig Canning. Dr. Canning has saved hundreds of lives, so it shouldn’t matter that he doesn’t actually care about his patients, should it? But Mara has a more urgent problem. She is now concerned that Canning might not be such a good sociopath after all. A young woman in Canning’s apartment building mysteriously plunged to her death from a balcony, and Mara fears Canning could be responsible. She needs to uncover the truth about Canning before the book comes out, so Annalisa has little time to search for answers.

For Chicago police detective Annalisa Vega, Sam Tran’s death presents an ominous puzzle. The ex-cop turned PI is found hanging from a cemetery tree with a message across his chest that suggests someone holds a murderous grudge against the police. Annalisa suspects the real answer lies in one of Tran’s open cases. She believes he stumbled on a dark secret during his investigations and someone killed him to keep him quiet. Her own family harbors plenty of secrets, something Annalisa is reminded of when her brother turns out to be one of Sam’s last clients. Vinny Vega hired Tran to find a dangerous stalker on his daughter’s college campus. Now Sam is dead and the stalker remains at large, with Annalisa’s niece, Quinn, firmly in his sights.

Chicago detective Annalisa Vega shattered her life, personally and professionally, when she turned in her ex-cop father for his role in a murder. Her family can’t forgive her. Her fellow officers no longer trust her. So when detective Leo Hammond turns up dead in a bizarre murder, Annalisa thinks she has nothing to lose by investigating whatever secrets he hid behind the thin blue line. Annalisa quickly zeroes in on someone who had good reason to want Hammond dead: a wealthy, fast-talking car salesman who’d gotten away with murder once and wasn’t about to let Hammond take a second shot. Moe Bocks remains the number one suspect in his girlfriend’s brutal unsolved death, and now he has a new woman in his sights --- Annalisa’s best friend.

The Lovelorn Killer murdered seven women, ritually binding them and leaving them for dead before penning them gruesome love letters in the local papers. Then he disappeared, and there hasn’t been a trace of him in 20 years. Grace Harper, who uses her snooping skills as part of an amateur sleuth group, believes that the Lovelorn Killer is still living in the same neighborhoods in which he hunted. If she can figure out how he selected his victims, she will have the key to his identity. Detective Annalisa Vega lost someone she loved to the killer. Now she's at a murder scene with the worst kind of déjà vu: Grace Harper lies bound and dead on the floor, surrounded by clues to the biggest murder case that Chicago homicide never solved.

Boston detective Ellery Hathaway met FBI agent Reed Markham when he pried open a serial killer’s closet to rescue her. Years on, their relationship remains defined by that moment and by Francis Coben’s horrific crimes. To free herself from Coben’s legacy, Ellery had to walk away from Reed, too. But Coben is not letting go so easily. He has an impossible proposition: Coben will finally give up the location of the remaining bodies, on one condition --- Reed must bring him Ellery. But Ellery is the one living person who has seen the monster behind the mask, and she doesn’t believe he can be redeemed. Not after everything he’s done. Not after what she’s been through. And certainly not after a fresh body turns up with Coben’s signature all over it.

After surviving a serial killer’s abduction as a young teenager, Ellery Hathaway is finally attempting a normal life. She has a new job as a rookie Boston detective and a fledgling relationship with Reed Markham, the FBI agent who rescued her years ago. But when a 12-year-old girl disappears on Ellery’s watch, the troubling case opens deep wounds that never fully healed. Chloe Lockhart walked away from a busy street fair and vanished into the crowd. Maybe she was fleeing the suffocating surveillance her parents put on her from the time she was born, or maybe the evil from her parents’ past finally caught up to her. For Chloe, as Ellery learns, is not the first child Teresa Lockhart has lost.

FBI agent Reed Markham is haunted by one painful unsolved mystery: Who murdered his mother? Camilla was brutally stabbed to death more than 40 years ago while baby Reed lay in his crib mere steps away. The trail went so cold that the Las Vegas Police Department has given up hope of solving the case. But then a shattering family secret changes everything Reed knows about his origins, his murdered mother and his powerful adoptive father, state senator Angus Markham. Unable to trust his family with the details of his personal investigation, Reed enlists his friend, suspended cop Ellery Hathaway, to join his quest in Vegas. They discover that young Camilla had snared the attention of dangerous men, any of whom might have wanted to shut her up for good.

Police officer Ellery Hathaway is on involuntary leave from her job because she shot a murderer in cold blood and refuses to apologize for it. Forced into group therapy for victims of violent crime, Ellery immediately finds higher priorities than "getting in touch with her feelings." For one, she suspects a fellow group member may have helped to convict the wrong man for a deadly arson incident years ago. For another, Ellery finds herself in the desperate clutches of a woman who survived a brutal rape. He is still out there, this man with the Spider-Man-like ability to climb through bedroom windows, and his victim beseeches Ellery for help in capturing her attacker.

Ellery Hathaway knows about serial killers, but not through her police training. She's an officer in sleepy Woodbury, MA, where a bicycle theft still makes the newspapers. No one there knows she was once victim #17 in the grisly story of serial killer Francis Michael Coben --- the only one who lived. When three people disappear from her town in three years, all around her birthday, Ellery fears someone knows her secret --- someone very dangerous. Her superiors dismiss her concerns, but Ellery knows the vanishing season is coming and anyone could be next. She contacts the one man she knows will believe her: the FBI agent who saved her from a killer all those years ago.