The Dark Flight Down (Book of Dead Days S.)

Blurb

The Dark Flight Down is a young adult fantasy novel by Marcus Sedgwick, first published in 2005. It is the sequel to his 2003 novel The Book of Dead Days. It tells the story of the fifteen-year-old Boy, his companion, Willow, and his new master, Kepler, in the aftermath of the death of Valerian, Boy's previous master.