Hidden under the surface of everyday London is a city where wild train spirits stampede over the tracks and glass-skinned dancers with glowing veins light the streets.

When a devastating betrayal drives her from her home, Beth stumbles into the secret city, where she finds Filius Viae, London's ragged crown prince, just when he needs someone the most. For an ancient enemy has returned to the darkness under St Paul's Cathedral, bent on reigniting a centuries-old war. Desperate to find a way to save the city they both love, they find themselves in a desperate race through this bizarre urban wonderland, but when Beth's best friend is captured, she must choose between this wondrous existence and the life she left behind.

The City's Son is the first book of The Skyscraper Throne trilogy: a story about family, friends and monsters, and how you can't always tell which is which.