If you've read this far in the Geekomancy series, you know what you're getting into. This one picks up right after the third story, the novella, so that is required reading as well (and who reading this isn't going to Collect Them All, really?).
Everything comes to a head in this one, and a lot of lingering questions are answered. Great to know that although this is the end of an arc, it isn't the permanent end of the series.