Heaven

On the ocean world of No-Moon, mariner Second-Best Sailor learns that his planet is threatened by evangelists. A devoted acolyte of Cosmic Unity, Servant-of-Unity XIV Samuel lives to spread its gentle message of universal harmony... until he discovers a dark secret buried in his religion's memeplex. Abandoning his faith, Samuel stumbles upon Second-Best Sailor, who is fleeing No-Moon in search of a new homeworld. Flung together by fate and joined by fascinating and bizarre creatures, the two new allies plot a kamikaze plan to fight off the invaders. But can they bring down an idea that has destroyed everything across tens of thousands of light-years?