"The accuracy of medical details and credible bomb threats mixed with genuine characters guarantees an unputdownable read. Buckle in and get ready for a fast-paced ride!" -Ivanka Fear, author of The Dead Lie and Where is My Husband? A trauma patient's dying request of AJ Docker leads him and his retired police dog, Banshee, to embark on their latest adventures. Partnering with his patient's sister, they embark on a quest to uncover powerful research that could alter the course of humanity. Shadowy enemies pursue them in Washington, D.C., in a race to capitalize on the information, while a new threat reveals itself at Doc's hospital. A greedy corporation is attempting to take over the emergency room, threatening the quality of healthcare nationwide. Doc has to fight a billion-dollar company to save more patients' lives as well as the careers of competent medical professionals. Banshee has his back as he battles on all fronts. Deadly Equation , book four in the AJ Docker series, delivers nonstop action alongside dramatic scenes from the emergency room. Using his own medical experience, Gerlacher brings readers into the chaotic, sometimes humorous, and sporadically violent world of the emergency room. Read the AJ Docker and Banshee Thrillers in any order, or follow the series from the beginning: Last Patient of the Night Faulty Bloodline Sin City Treachery Deadly Equation Terminal Exchanges - coming October 2025 The Phantom Files - coming March 2026