The Compton Crook award-winning, Nebula-nominated Updraft by Fran Wilde landed her acclaim, accolades and a very fine YA novel to start the novel portion of her writing career. Focusing on a New Weird world above the cloud of flyers, skymouths and towers of bone, Updraft was one of the most memorable books I read in 2015. Cloudbound, which came out in 2016, took the world of the Bone Towers and its characters in new and intriguing directions. Somewhere in there, the series got a reboot of covers, too. Now, with Horizon, Fran Wilde completes the trilogy. After the revelations of Cloudbound, and the instability that the Bone Tower society has undergone after the events of Updraft, Horizon brings us to the ground, literally and figuratively, in this concluding volume. The three novels of the Bone Towers Trilogy have all done different things, and done them well. Updraft is a classic YA coming of age story with a strong central protagonist, unfolding and unfurling the wings of the author’s worldbuilding even as we have a deep dive into the personality, hopes, fears, dreams and struggles of Kirit. It would have been the easier, safer and perhaps more expected path for the author to continue the trilogy from Kirit’s point of view and go for a grand arc of Kirit’s story at the time of great change for her community.  Surely, I think, the author must have considered and contemplated that sort of path for her subsequent novels.