I read it within the last 3-4 years in the United States in English, and I think it was a relatively new book at the time. The protagonist is a female, I think recently laid off from her job as a travel writer. She finds a notice on a messageboard (at a coffee shop?) for a local business looking for travel writers. She bulls her way into an interview despite them repeatedly telling her she's not suitable, and finds that the business caters to supernaturals. Long story short, despite her relative frailties and ignorance, she's engaged to build a guide to exploring the city when you're a vampire, a zombie, or the like. Most aspects of the supernatural are fairly traditional. Vampires need to drink blood and can hypnotize people with their gaze. Zombies are slow rotting corpses and eat brains (although there's a slight twist in that the brain-eating is an addiction of sorts and being without them results in them going on rampages to get their fix). I want to say that the human resources woman is a water-spirit of some sort.
Plot developments included the delivery of the zombie's brains being disrupted, nearly resulting in a rampage, a shadowy organization dedicated to killing the supernatural which the main character gets mixed up in, and a fortune-telling witch who favors the protagonist for being willing to buy her a coffee. The witch is somehow tied into the supernatural-slaying group, although I forget exactly how.
I'm pretty sure that it was set in a real-world city, maybe New York. The title might include the name of the city, and I think was entitled something like "Things to Do in Denver When You're Dead" (no, it's not that movie or book). The cover was mildly cartoonish and showed the protagonist walking down a street with some supernatural characters sprinkled in the background.