I've only read the first chapter of Faeries of Dreamdark: Blackbringer, by Laini Taylor, but I think I'm going to enjoy it.
The overall premise is nothing new - in a war a long time ago, faeries imprisoned devils into silver bottles and cast them into the sea, now human beings are pulling up these bottles and uncorking them, letting the devils loose on the world once more. (Similar to the myth of Pandora's Box for a start, and several other stories including The Thirteen Ghosts of Scooby Doo, a personal favorite of mine since Vincent Price leant his voice to it!)
And now, an especially powerful Devil - Blackbringer - has been set free.
So while the starting point is a familiar one to anyone who reads fantasy - or horror, for that matter - it's where the author takes the concept, and how and why, that matters - because that's all new. Laini writes very well, her heroine, Magpie the faerie is appealing, and there's curiosity and a desire to know.
My review of the book will be appearing in a couple of days.