Extinction (The War of the Spider Queen series Book 4)

New York Times bestseller
 
The mystery of Lolth remains, leaving the drow to wonder if she has truly turned her back on them forever. In this fourth installment in the War of the Spider Queen series, priestess Quenthel Baenre and her fellow drow adventurers continue their quest for the truth—and this time, the stakes are higher than ever. Now they must travel to a place from which few ever return: the Demonweb Pits of the Abyss.
 
But not all of Quenthel’s companions are confident in their faith. Disheartened by Lolth’s silence, priestess Halisstra Melarn becomes enamored of a different goddess, calling her loyalty to Lolth into question . . .