Runescape: Return to Canifis (Electronic book text)

Varrock is the greatest human city in the world, yet it is filled with dangerous secrets. People are being taken by an inhuman abductor. Its victims are murdered... or worse, spirited away to Morytania, where vampires rule.
As unrest against the crown grows, the King chooses to send the now-famous Kara-Meir and her friends across the holy river into Morytania, the land of the dead.