The Lone Drow

The Lone Drow is the second book in The Hunter's Blade Trilogy by R.A. Salvatore.

Summary
It starts with the orc chieftain Obould Many-Arrows talking to his followers. He wishes to destroy the dwarves of Mithral Hall. Drizzt in the meantime thinks only about one thing. The fact that he saw an entire tower of stone fall upon his friends, Catti-brie, Bruenor, Regis and Wulfgar. They are, unbeknownst to him still alive, but he blames the orcs and goes into a wild frenzy in which he becomes a feared hunter and killer of orcs.