What happens when a stalker... doesn't know they have a stalker of their own? Cassandra follows her ex-boyfriend, Mike. It's all she's ever done since their breakup. Some people have hobbies like tennis, or reading, but for Cassandra, stalking Mike brings her the most fulfillment. But now that Mike has found a new romantic interest in a woman named "Zoe," Cassandra worries he'll move on for good, and she'll never get the chance to win him back. She decides to break up the budding connection before the romance even has a chance to grow. And to make matters worse, Cassandra doesn't know she's being followed by a mysterious figure who refers to themselves only as "The One." "The One" stalks Cassandra just as Cassandra stalks Mike... and "The One" is determined to foil Cassandra's plans. "The One" will make sure Mike and Zoe end up together. Can Cassandra destroy this budding connection, and discover the identity of her own stalker? Or will she lose at her own game? In Book Four of the Predator / Prey Thriller Series, fans of Mary Stone, Shari Lapena, and Freida McFadden will find unputdownable domestic thriller that pits two stalkers against each other in a dangerous game. NOTE: This book is an origin story and can be read out of order with the rest of the series!