If we deconstruct the sentence what's clear is that "the king who came" is the subject and "sharts" is the predicate e.g. he came previously but this is the tale of how he sharts
Wonder whether the book's actually good. And whether there's some specifically intended political meaning? The blurbs I could find online seems to say that it's historical fiction about the Bar Kokhba revolt, but not sure what statements (if any?) about history/contemporary politics it's trying to make.