“Sometimes scientific discovers are forgotten. Sometimes it's better that way...” One hundred and fifty years apart, two men are attacked and killed in exactly the same part of exactly the same church. The only thing linking the incidents is the fact that in both cases, eyewitnesses reported seeing an angel. Although he's familiar with many of London's more bizarre inhabitants, Robinson is certain of one angels aren't real. He's frustrated, then, when he finds he can't disprove multiple sightings of deadly, winged figures across the city. And when one of the creatures attacks an underground train, Robinson realizes that time is running out. Meanwhile, priceless religious relics are starting to go missing, including several ancient bones that are said to have once belonged to angels. As Robinson, Katie and Quix investigate, along with a semi-sympathetic police detective named John Milhouse, they discover that something dark and powerful is brewing behind the scenes of one of London's most advanced research organizations. Archangel is the second book in the Ghosts of London series, about a group of investigators who take on the more bizarre cases thrown up by one of the world's oldest cities.