I can't guarantee no spoilers here.... be warned
Harry Dresden is BACK! From the dead! Oh, thank goodness. I didn't like ghost Dresden at all.
So Dresden ended up making a deal with Mab, the Winter Queen, in order to come back to the land of the living. She helped make sure he lived and was being "cared for" on the island of Demonreach after he was shot and killed. Now, Dresden is the Winter Knight. Oh, Dresden.
He awakens in Mab's world, getting a form of physical therapy, which includes being nearly killed in creative ways every day by Mab. Keeps him on his toes, ya know. Mab sends Harry back to Chicago with his first order: kill Maeve, Mab's daughter, the Winter Lady. Except...she's immortal.
There is so much action going on in this book it was a little hard to follow. True, Harry has his order, but he also has assassins after him, coming back to his friends and family (who think he's dead), Demonreach (it's a jail for evil evil things) about to explode, The Wild Hunt, meeting Mother Winter and Mother Summer (whoa), the war on the outer edges of NeverNever, the Nemesis, Outsiders..... The list is endless.
All in all, this was a great Dresden book with a whole lot going on. Exactly what I come to expect from Jim Butcher. BUT.... the ending was a game changer. Completely unexpected (at least to me!) and points us and the characters in a whole new direction.
Can't wait for the next one.