Bradley Garrett is an American-born social and cultural geographer and expert on exploration, urban politics, and subterranean space. He holds a PhD from the University of London and has published over fifty academic journal articles and book chapters. His work, which often has him entering lost, forgotten, or off-limits places, has been featured on the History Channel and in The Atlantic and GQ. He has previously authored several critically acclaimed books on urban exploration, and his new book is Bunker: Building for the End Times.