I'll admit that I haven't read much urban fantasy, but if it's anything like this? I will gorge on all of it. 
 I was skeptical at the first mention of magic. It started fabulously strong, with a kickass lady lead and an equally kickass lady who tries to recruit her into her secret project. Oh, and did I mention they're all mentally unstable? And this is Hollywood, where no one takes crap from anyone else? 
 I was undecided about the elements of magic and the fey and the secret Other world, but then it became an intricate part of everything that was impossible to let go of. You can't tell Millie's story without sharing her tragic past and seeing everything through a film director's lens--but you also can't tell it without otherworldly gates and fairy magic. 
 The characters make this story--it wouldn't be half as strong without a strong cast, all of which are imperfect and mentally unstable. Stick them all in a room together, and you get fabulously uncensored snark. But they're also forced to work together to track down this mysterious viscount of Arcadia, who's hiding in Hollywood as a movie star. As you do. 
 It's a fantasy story, and it's an adventure. I've read my fair share of adventure novels that most are predictable, but this doesn't get dull. Adding a bit of fairy dust makes things interesting, and the rules constantly change. It's not deep literature. It's a bit fluffy at its core, despite hardheaded Millie. But it's enjoyable, and you latch onto these characters, and by the end you're forcing yourself to read one word at a time--otherwise you're going to spoil yourself by skimming ahead to find out what happens next.