The Gentleman Bastards series by Scott Lynch.
I am in complete adoration of this series right now.  Each sequence is as memorable and gripping as the last, and it's so beautifully written.  They dialogue is impeccable and the plot...don't even try to guess where it's heading because it has about a thousand carpets to pull out from under your feet.  Just go along for the ride, because you won't regret it.