Turn Coat by Jim Butcher

When it comes to the magical ruling body known as the White Council, Harry keeps his nose clean and his head down. For years, the Council has held a death mark over Harry's head. He's still thought of as a black sheep by some;and as a sacrificial lamb by others. But none regard him with more suspicion and disdain than Morgan, a veteran Warden with a grudge against anyone who bends the rules.
Like Harry.
So when Morgan turns up asking for help, Harry isn't exactly eager to leap into action. Morgan has been accused of treason against the White Council;and there's only one final punishment for that crime. he's on the run, he wants his name cleared, and he needs someone with a knack for backing the underdog.
Like Harry.
Now Harry must uncover a traitor within the Council, keep a less than agreeable Morgan under wraps, and avoid coming under scrutiny himself. And a single mistake may cost someone his head.
Like Harry...  From Goodreads.

I am thoroughly enjoying this series about Harry Dresden. This book is a bit more "political" as Harry gets involved more with some from the White Council. But of course there are several life and death fights as there must be. I like Harry's brother Thomas and this book sees a change in that relationship which I hope will change again.

This book qualifies for: 
100 books in a year Reading Challenge 2012, 
Goodreads 2012 Reading Challenge, 
2012 Ebook Challenge,
2012 Witches & Witchcraft Reading Challenge,
Finishing the Series Reading Challenge