Homeland by R.A. Salvatore.

As the third son of Mother Malice and weaponmaster Zaknafein, Drizzt Do’Urden must be sacrificed to Lolth, the evil Spider Queen, per the traditions of their matriarchal drow society. But with the unexpected death of his older brother, young Drizzt is spared—though still at the mercy of his abusive sisters.

As Drizzt grows older, and proves himself to be a formidable warrior at Melee-Magthere Academy, he realizes his idea of good and evil does not match up with those of his fellow drow, who show only cruelty to the other races of the Underdark . . . Can Drizzt stay true to himself in a such an unforgiving, unprincipled world?

Drizzt Do’Urden, first introduced in The Icewind Dale Trilogy, quickly became one of the fantasy genre’s standout characters. With Homeland, Salvatore pulls back the curtain to reveal the fascinating tale of how this hero came to be—how this one lone drow walked out of the shadowy depths of the Underdark to leave behind an evil society and a family that wanted him dead.