Six of Crows- Leigh Bardugo

Six dangerous outcasts. One impossible heist. Kaz's crew is the only thing that might stand between the world and destruction  if they don't kill each other first. Ketterdam a bustling hub of international trade where anything can be had for the right price and no one knows that better than criminal prodigy Kaz Brekker. Kaz is offered a chance at a deadly heist that could make him rich beyond his wildest dreams. But he can't pull it off alone.