The Agents of the Crown series returns with this riveting novel following the original MI6 agent, John Dee, as he is assigned a dangerous mission to recreate a weapon from antiquity, Greek fire. As she travels through Waltham Forest, Queen Elizabeth I is ambushed by masked gunmen who leave her carriage riddled with holes before disappearing into the night. The Queen's Private Secretary, Sir Francis Walsingham, is tasked with finding the perpetrators, about whom they know precious little. But someone alerted the gunman to the route of the Queen's carriage, and Walsingham knows that the assassins will not stop until she's dead unless loyal friend John Dee can stymie them.