Whispers in the Dark (Black Oasis, Book 1) - Nikole Knight, Lily Mayne

At twenty-four, Cody has already lost hope of having a life of his own. All his time is spent playing nurse to a dying, spiteful stepfather and maid to his bully half-brother. His only escapes are playing his favorite online fantasy game, Black Oasis, and talking to the strange, unearthly presence under his bed that may or may not actually exist.