Shadow and Bone

Blurb from SLJ

Another Bardugo fantasy read! This time she has created a wildly imaginative story of six young people who have been commissioned to pull off the greatest heist of all time. They are to nab the creator of jurda parem, a highly addictive product that enhances the innate paranormal powers of the Grisha peoples, in the hopes of creating weapons of war that will upset the balance of power and destroy the economies of rival governments. 

Kaz, the hero of the story and mastermind of the plot, recruits five others to aid in his quest for revenge for the loss of his brother and the promise of vast wealth. 

The first novel in a triology (and Netflix series).