In the labyrinthine corridors beneath London, the city's famed Silver Vaults lie as a fortress of gleaming treasures. But even a place bristling with high security isn't immune to dark magic and clandestine killings. That's where Detective Constable Peter Grant comes in, alongside his supervisor DCI Thomas Nightingale. When they're called to investigate an improbable murder in this seemingly impenetrable location, the case unravels a web that ties modern crime to ancient histories, reaching as far as the daunting landscapes of the North. As Peter navigates through entwining mysteries, there's added pressure waiting for him back home, where his partner Beverley is close to giving birth. Amidst impending fatherhood and supernatural uncertainties, Peter stumbles upon enigmas that challenge his very understanding of the magical world. 'Amongst Our Weapons' is a thrilling addition to the Rivers of London series, presenting an urban fantasy rich with humor, unexpected twists, and a landscape where history and magic collide.