The Coworker is a gripping psychological thriller that pulls you into a workplace filled with secrets, lies, and shocking betrayals. When Natalie’s awkward, introverted coworker Dawn suddenly goes missing, Natalie reluctantly gets involved—only to discover disturbing truths about Dawn’s life and her own. As the investigation unfolds, the line between victim and villain begins to blur, and Natalie realizes someone in the office knows far more than they’re saying. With Freida McFadden’s trademark twists, unreliable perspectives, and jaw-dropping reveals, The Coworker keeps readers guessing until the final page. Dark, fast-paced, and addictive, it’s a must-read for thriller lovers.