Night Angel by Brent Weeks
For Durzo Blint, assassination is an art – and he’s the most talented artist in the city
For Azoth, being a guild rat means growing up in the slums and doing what it takes to survive. Which means taking risks, even insane risks like being mentored by Durzo Blint. But, in order to move forward with Durzo, he must leave behind everything and everyone he has ever known and embrace his new identity as Kylar Stern. Kyle Stern enters world of dangerous politics, strange magic, and cultivating a flair for death.
Becoming Durzo Blint’s apprentice may be more than Azoth can handle and keeping his two identities a part is more complex than he thought. It may bring the end to both of his identities if Durzo chooses.