Forgotten Realms Shadow's Witness Sembia Trilogy #2 Wizards of the Coast 2000
Erevis Cale. The loyal servant of the Uskevren family, has a terrible secret. Now, when a ruthless evil is unleashed on Selgaunt, the butler's ties to the underworld may have put the Uskevren in jeopardy.
Erevis must finally prove his loyalty - to the city and to the Uskevren. He won't get a second chance.
