Under the streets of London lies a world most people could never dream of. When Richard Mayhew stops to help a girl he finds bleeding in the street, his unremarkable life changes in an instant. This act of kindness leads him to a place filled with murderers and angels, pale girls in black velvet, a Beast in a labyrinth and an Earl who holds Court in a tube train. It is strangely familiar yet utterly bizarre. Here is London Below, the city of people who have fallen between the cracks. And for Richard Mayhew, it's just the beginning.

You may think you know London, but don't be so sure! Head into the fantastical world of London Below to meet Rat Talkers, the Black Friars, Old Bailey, the Angel Islington, and lots more. And of course, meet Door, the last surviving member of the house of Temple and Arch, as she tries to find out what happened to her family, while trying to stay alive herself. And watch out for the Beast of London while you are down there...