Servant of the Shard — R.A. Salvatore

With each kill, I grow wiser, and with added wisdom, I grow stronger.

Powerful assassin Artemis Entroi tightens his grip on the streets of Calimport, driven by the power his hidden drow supporters. Brut his sponsor Jarlaxle grows more ambitious, and Entreri struggles to remain cautious and in control. Soon, the power of the malevolent Crystal Shard grows greater than them both, threatening to draw them into a vast web of treachery from which there will be no escape.