Edgedancer (The Stormlight Archive #2.5), by Brandon Sanderson

  This is one of those little gems that Brandon Sanderson creates in order to further flesh out a specific character or part of his fictional worlds. It acts like a standalone, but it also enriches an entire universe if you are willing to spend the time and effort.

  Edgedancer focuses on Lift, a young female thief that also has bonded with a spren because of her potential to life the ideals of the Knights Radiant. But really it's more about a little girl who in absence of any societal education, makes the rules as she goes along by listening to her heart. Typical Sanderson.

  It's a really nice, short read with compelling characters and the usual quirky fun dialogues that say more than what appears at first glance.