Ferals #2: The Swarm Descends is the second book in a dark middle grade fantasy series that's part Batman, part The Graveyard Book, and all page-turning adventure. The sinister Spinning Man has been defeated-but a powerful new villain has risen from the shadows. The Mother of Flies has eyes everywhere, and she is searching for Caw. As the last survivor of a long line of crow ferals, Caw holds a crucial piece of Blackstone's legacy-one the Mother...

In a city ravaged by crime and corruption, 13-year-old orphan Caw's only friends are the murder of crows he has lived with since his parents flung him from their house aged only five. Caw lives in a treehouse in an abandoned city park, surviving on scraps of food and only communicating with his three crows. But a jailbreak at the prison forces him into contact with other humans -- particularly a girl called Lydia, who is attacked by the escaped prisoners...