is sci-fi allowed as well? In that case "rainbows end" by Vernor Vinge (can be downloaded for free from his website) If just fantasy: "Monstrous regiment" by Te

is sci-fi allowed as well? In that case "rainbows end" by Vernor Vinge (can be downloaded for free from his website) If just fantasy: "Monstrous regiment" by Terry Pratchett