Rosemary and Rue by Seanan McGuire. Another urban fantasy with a female protagonist. I'm looking for something as good as Ilona Andrew's Kate Daniels series.
This isn't, but it was fun.

Protagonist October Daye (known as Toby) is a changeling who lives in San Francisco. “Changeling” means “mixed blood” - part fae, part human. When Toby was a teen with nowhere to live, she went to live in “Home”, a magical squat for runaway teen changelings, whose owner, Devin, became her first lover. After leaving him, and Home, Toby became a Knight of the local fae King – and then decided to pass as human, becoming a private eye and marrying a mortal man who had no idea of her secret. “I could explain almost anything by saying I had to work, and a lot of the time, it was the truth. It's just that sometiems my cases were more Brothers Grimm than Magnum P.I.”
And that's all before the story begins. It starts with Toby on a job, trying to find the kidnapped wife and daughter of her liege King. In doing so, she gets turned into a fish in a fish pond for fourteen years.
That brings us through chapter one.
Most of the book is about her next case. After recovering from fishhood, Toby is trying to live as mortal, making a living as a night-time cashier in a supermarket. But she Toby is forced by spell-binding (on her phone's voice mail) to take a case discovering who killed Countess Evening Winterrose, a hotshot fae California CEO. To pursue the case she must re-encounter some faces from her past (The Queen, her Lord Sylvester and his family, the king of the cat people, Devin) and some new magics and monsters. I particularly liked the Luidaeg.
The writing is bright and lively, maybe even breezy. Toby's point of view is fun, sometimes even frustrating: we know what she explains, but she doesn't explain everything, and she doesn't know everything – so we really don't even know the pattern of her universe. The setting is fun: a fairy tale mapped onto modern San Francisco. The characters are engaging, especially some of the teenagers. There is a glossary of fae races at the beginning of the book, but I found I would have preferred a list of characters.
The plot is predictable; I had the murderer guessed halfway through. And certain key elements of the story are left hanging. I would assume that the plot of Lord Sylvester's family's kidnapping and the evil Lord Simon, the fate of Toby's daughter and husband (and her mother), and her relationship with Tybalt of the Cait Sidhe, will become the focus of later books in the series.
More bothersome: Toby was a complainer. I don't think she does anything without complaining about it before had. Sure, she's hard put upon, but I wanted to say, “Shut up and stop whining.” Half the time she's being shot or beat up: a little of that went a long way. I'd have liked a lot less violence, and a protagonist who didn't find twenty things to gripe about every chapter.