Leigh Bardugo's Crooked Kingdom, the follow-up to Six of Crows, was an absolutely perfect finish to this duology. The series as a whole is full of heists, tension, travel, and magic, as well as a wonderfully diverse cast, covering a variety of people across many races, sexualities, and disabilities. It is well written, well plotted, and even gorgeously designed!
They are currently only out in hardcover, but the young adult category puts them at a lower price point, and when you see the physical books, you won't want to wait until mid-2017 for the paperback! The duology follows Bardugo's Grisha trilogy, which is not necessary to have read before these books, but you may get more background if you do so.