The search for a friend’s killer is a riveting lesson in the ways war has changed
The EOD—explosive ordnance disposal—community is tight-knit, and when one of their own is hurt, an alarm goes out. When Brian Castner, an Iraq War vet, learns that his friend and EOD brother Matt has been killed by an IED in Afghanistan, he goes to console Matt's widow, but he also begins a personal investigation. Is the bomb maker who killed Matt the same man American forces have been hunting since Iraq, known as the Engineer?
In this nonfiction thriller Castner takes us inside the manhunt for this elusive figure, meeting maimed survivors, interviewing the forensics teams who gather post-blast evidence, the wonks who collect intelligence, the drone pilots and contractors tasked to kill. His investigation reveals how warfare has changed since Iraq, becoming individualized even as it has become hi-tech, with our drones, bomb disposal robots, and CSI-like techniques. As we use technology to identify, locate, and take out the planners and bomb makers, the chilling lesson is that the hunters are also being hunted, and the other side—from Al-Qaeda to ISIS— has been selecting its own high-value targets.

Brian Castner is the author of the acclaimed memoir The Long Walk. An EOD officer in the Air Force who commanded bomb disposal units in Iraq and subsequently trained soldiers prior to their tours in Iraq and Afghanistan, he is now a writer and journalist. His stories have appeared in VICE News, the New York Times, the Daily Beast, Wired, Outside, Foreign Policy, and the Los Angeles Review of Books and on NPR. He has twice received grants from the Pulitzer Center on Crisis Reporting, to cover the Ebola outbreak in Liberia in 2014, and to paddle the 1200 mile Mackenzie River to the Arctic Ocean in 2016. His newest book, Disappointment River, will be published by Doubleday in spring 2018 (month TK). He lives with his family in Buffalo, New York.