This is not a traditional review of Kat Richardson’s Greywalker. I’m going to talk instead about the technique Richardson uses to introduce her paranormal world and her main character’s magical power.
Richardson’s premise is that abutting our dimension is a transitional dimension known as the Grey. Some creatures live in the Grey; some come through it from other places. Vampires, werewolves, ghosts and ghouls move about freely in it, and can shift easily from the Grey to here.
Most (not all) urban fantasies start with a character who is already magical.