Nick Hayes takes the news of his imminent death pretty well, or at least as well as any fifteen-year-old boy would. With an aggressive form of leukemia, the same disease he lost his father to a few years back, he knows that he has to live in full the last few months of his life. And what would that entail? Playing D&D with his friends, of course. But when the seemingly random events of his D&D campaign start mirroring real-life situations, or vice versa, he realizes that leukemia may not be his biggest problem yet.
Grey Sister might as well be the most well-written book I've read in my life.