King of Scars (King of Scars, #1)

by Leigh Bardugo

Nikolai set to opening the Schuyler combination locks he’d learned about from a certain master thief in Ketterdam.

She wished she had Inej’s gift for spywork or Kaz’s gift for scheming, but she only seemed to have Jesper’s gift for bad decisions.

“Stop punishing yourself for being someone with a heart. You cannot protect yourself from suffering. To live is to grieve. You are not protecting yourself by shutting yourself off from the world. You are limiting yourself, just as you did with your training.”