Shadow's Witness

Shadow's Witness is the second book of the Sembia series by Paul S. Kemp. It follows Erevis Cale, the butler of the Uskevren noble family of Sembia. "Erevis Cale, loyal servant to the Uskevren family, can't keep his secret any longer.

From the nobles in their towers to the gangs in the streets, in the city of Selgaunt power belongs to the bold and no one's position is certain. When a thieves' guild attempts to eradicate a rival organization, something unspeakable breaks free -- and it's hungry.

With Selgaunt in chaos, Erevis Cale must return to the shadowy life he left behind, to protect the family that has made him one of their own from the horrors of the Abyss.

Enter the greatest fantasy setting of our generation -- enter the Realms"