Night Angel Books in Order

The Night Angel books are set in Midcyru, a continent of warring kingdoms, strange magic, and old gods, but they always come back to one city, Cenaria. On the surface Cenaria is a faded monarchy. In truth it is ruled from the shadows by the Sa'Kage, a council of crime lords who control smuggling, protection, and murder for hire.(nightangel.fandom.com)

The story begins in the Warrens, a maze of alleys and tenements where orphan gangs scrape by on theft. Azoth is one of those kids, terrified of his own guild boss and dreaming of something better. That dream hardens into a plan when he sees Durzo Blint, Cenaria's most feared wetboy, kill a man without breaking stride.(en.wikipedia.org)

Azoth begs to be Durzo's apprentice and, after a brutal test, is given a new name, Kylar Stern, and a new life. Over years of training he learns poisons, politics, sword work, and the secrets of the ka'kari, living artifacts that grant power and a terrible kind of immortality. He also learns that taking lives for money clashes badly with the loyalty he still feels toward his old friends and toward a decent young noble, Logan Gyre.(nightangel.fandom.com)

Across the trilogy, Kylar and Logan are pulled into larger storms. A northern empire led by the Godking Garoth Ursuul invades. Cenaria's weak king and scheming nobles fracture under the pressure, and the Sa'Kage see a chance to profit from chaos. What starts as street level survival turns into a struggle over who will rule Midcyru and what kind of justice, if any, will follow.(it.wikipedia.org)

Each volume has its own flavor. The Way of Shadows reads like a coming of age assassin tale rooted in one grimy capital. Shadow's Edge explores the fallout from conquest as Kylar tries to retire, build a family with Elene, and is forced to face what that peace really costs. Beyond the Shadows blows the doors wide open with continental war, strange magic, and an assignment that might require assassinating a goddess.(en.wikipedia.org)

Two later works widen the view. The novella Perfect Shadow jumps centuries into the past to follow the man who will become Durzo Blint as he climbs through Cenaria's underworld and discovers what the ka'kari really demand. Night Angel Nemesis returns to Kylar long after the original trilogy, when he is trying to retire from killing but is pulled into one more job to protect High King Logan Gyre and a fragile new peace.(es.wikipedia.org)

Expect a dark tone, graphic violence, and a lot of gallows humor, but also stubborn friendship and small acts of kindness. At its heart the series keeps asking whether someone who has done terrible things can still choose to be better and what that choice might cost.