Six of Crows Duology, Not Original but Well Executed

Six of Crows (Six of Crows, #1) by Leigh Bardugo
Published by Henry Holt and Company on September 29th 2015
Genres: Fantasy, Young Adult
Pages: 462
Format: Hardcover
Source: Purchased

Goodreads

Criminal prodigy Kaz Brekker has been offered wealth beyond his wildest dreams. But to claim it, he'll have to pull off a seemingly impossible heist:

Break into the notorious Ice Court(a military stronghold that has never been breached)

Retrieve a hostage(who could unleash magical havoc on the wo...