The Sorrows by Jonathan JanzHardback
Something is trapped in the castle, and it wants to feed! The Sorrows, an island off the coast of northern California, and its castle have been uninhabited since a series of gruesome, unexplained murders in 1925. But its owner needs money, so he allows film composers Ben and Eddie and a couple of their female friends to stay a month in Castle Blackwood. Eddie is certain an eerie and reportedly haunted castle is just the setting Ben needs to find musical inspiration for a horror film. But what they find is more horrific than any movie. For something is waiting for them in the castle. A being, once worshipped, now imprisoned, has been trapped for nearly a century. And he's ready to feed.