Majestic and expansive, this was really wonderful. Two truly star-crossed (and not to mention time-crossed) lovers and their attempts to save humanity from a vicious, sentient disease called "The Caul." Just beautiful. I only wish that was longer so I could learn more about these worlds, and that I had more time to read it and decipher the alien language used (FYI there is an alphabet for that in the back of the novel).