Skin Game by Jim Butcher

Harry Dresden, Chicago’s only professional wizard, is about to have a very bad day….
Because as Winter Knight to the Queen of Air and Darkness, Harry never knows what the scheming Mab might want him to do. Usually, it’s something awful.
He doesn’t know the half of it….
Mab has just traded Harry’s skills to pay off one of her debts. And now he must help a group of supernatural villains—led by one of Harry’s most dreaded and despised enemies, Nicodemus Archleone—to break into the highest-security vault in town so that they can then access the highest-security vault in the Nevernever.
It’s a smash-and-grab job to recover the literal Holy Grail from the vaults of the greatest treasure hoard in the supernatural world—which belongs to the one and only Hades, Lord of the freaking Underworld and generally unpleasant character. Worse, Dresden suspects that there is another game afoot that no one is talking about. And he’s dead certain that Nicodemus has no intention of allowing any of his crew to survive the experience. Especially Harry.
Dresden’s always been tricky, but he’s going to have to up his backstabbing game to survive this mess—assuming his own allies don’t end up killing him before his enemies get the chance…. From Goodreads.

I have been waiting for this book and it did not disappoint. It is quite difficult for Harry being the winter knight as it often works against his own ethics and now he also has a psychic parasite in his head that will kill him. 
Mab, the winter Queen, threatens him to work for a fallen angel to pay of a debt she owns him.
I like that Karrin, Michael and Butters are back, all with quite important roles to play. 

This is a fabulous series that I recommend to anyone who likes fantasy or paranormal books.  

This book qualifies for:
2014 Ebook challenge
2014 Literary Exploration Reading Challenge 
2014 Full House Reading Challenge
You Read How Many Books? Reading Challenge 2014
Sequel Spring Reading Challenge
Crazy Challenge Connection: 1000 Member Celebration!
Goodreads Reading Challenge 2014
Crazy Challenge Connection - Sub-Genre Challenge 2014
Nothing but Reading Challenges - Spell it Out - Animal Alphabet
Nothing but Reading Challenges - 50 States Challenge
Crazy Challenge Connection Bard of Avon