When the past collides with the present, the only way to ensure the future lies in the ultimate kill… Naomi McCall is a woman of many secrets. Her family has been murdered and she’s been forced into hiding. No one knows her past or her real name, not even the man she loves. Jake Tyler, former Marine and the newest recruit to the private criminal investigation agency, CORE, has been in love with a woman who never existed. When he learns about the lies Naomi has weaved, he’s ready to leave her—until an obsessed madman begins sending her explosive messages every hour on the hour. Innocent people are dying. With their deaths, Naomi’s secrets are revealed and the truth is thrust into the open. All but one. Naomi’s not sure if Jake can handle a truth that will change their lives. But she is certain of one thing—the only way to stop the killer before he takes more lives is to make herself his next victim.

When a deranged mother's grief drives her to replace her dead son over and over, obsession leads to murder... Chicago detective Jessica Donavan will never stop looking for her missing daughter. Her obsession has destroyed her marriage, but the search is the only thing that helps keep her sane and her mind off of everything she’s lost—her husband and her baby girl. When she uncovers a string of unsolved disappearances and reappearances of a number of baby boys, Jessica turns to her soon to be ex, Dante Russo, a former Navy SEAL turned investigator for the private agency, CORE, to help her fit together the pieces in this perplexing puzzle. But as Dante helps her, she realizes just how much she still craves his support—and his touch. Dante is still in love with his wife and would do anything to have her back in his life again. He’s been miserable since she left him to deal with the grief over their daughter’s abduction, never understanding how much he grieves as well. When Jessica tells him about the case she’s working, he jumps at the chance to take part in her investigation. He's hoping not only to save their marriage and ease his personal pain over the loss of their daughter, but to stop a serial kidnapper from taking another victim. As Jessica and Dante work side by side, pregnant women begin to turn up missing or dead, and they start to uncover the consequences of another woman's unfathomable grief. The childless mother doesn’t just want a baby. She wants a newborn straight from the womb. And when forced to confront the dark and twisted perversion of a mother's obsession, can Jessica and Dante find their lives again…or merely more death?

When the hunter becomes the hunted…who will become the ultimate prey? CORE agent Lola Tam has two things on her mind, quitting her job as a criminal investigator and baking a frozen pie for Thanksgiving dinner without burning it. But a midnight call forces a change of plans. Her boss and future stepfather, Ian Scott, has been kidnapped from his Florida vacation rental—along with her mother. The kidnapper’s plan? Drop Ian and her mom in the Everglades and hunt them like animals. Terrified for her mom, Lola takes the bait and travels to Everglade City, Florida where she’s determined to end the hunt before it begins. Ryan Monahan, former Navy SEAL turned airboat captain is used to taking tourists through the Everglades, not guiding a sexy agent on a rescue mission. After spending years dealing with a past filled with guilt and regret, he needs a little action and adventure in his life—he needs to prove he could still be a hero. What he doesn’t need? Falling for a woman he has no business wanting, especially when the hunt takes a deadly turn… Mason returns with another sexy, suspenseful CORE adventure! The Ultimate CORE trilogy wraps up with this explosive, final story...where will the series go next? Keep reading to find out!