If this had just been written by an author I'd never heard of, I might've given it two stars, but since it has Gaiman's name on it I hold it to a higher standard. After reading this, I can only think of sketchy reasons for why Gaiman's name is on this piece of garbage.

It doesn't read like his collaboration with Terry Pratchett: "Good Omens". There is no mark of his hand at all. The writing is clunky and the similes are just so bad that they are like leftover school pizza (almost exactly like that). The protagonist is an idiot, and unfortunately it is only by his idiocy that the plot moves at all. Any good possible uses of the many-worlds setting are wasted in favor of paper villains and a war that fails to feel like it matters in any way.