A Novella about magic vs aliens vs science. It's a raucous, campy sci-fi read involving humans gaining magic, a possibly pizza-hating alien empire, the decapitation of the US Federal Government, eldritch abominations, lesbian space witches and some medium-hard science.
I wouldn't say it's not serious, but I wouldn't say it's serious. Eh, it's not serious.

Wait... it's getting serious.