Sir Thursday (The Keys to the Kingdom #4)

The stellar fourth book in Garth Nix's masterpiece series.

On the fourth day there was war . . . Following their adventures in the Border Sea, Arthur and Leaf head for home. But only Leaf gets through the Front Door. Arthur is blocked because someone . . . or something . . . has assumed his identity and is taking over his life. Before Arthur can take action, he is drafted by Sir Thursday and forced to join the Glorious Army of the Architect. While Leaf tries to banish Arthur's doppelganger on earth, Arthur must survive his basic training, avoid getting posted to the Front and work out how he can free Part Four of the Will. . . .

Garth Nix is the New York Times bestselling author of the Old Kingdom series, a modern classic of fantasy literature that includes the novels Sabriel, Lireal, Abhorsen, and Clariel. He is also the author of The Keys to the Kingdom series, Shade's Children, A Confusion of Princes, Newt's Emerald, and (with Sean Williams) the Troubletwisters series, among other novels. You can find out a whole lot more about him at garthnix.com.