The disadvantages of a creative mind

Steven harper is a writer of sorts. After signing a book deal, he's sure he's on his way to fame. His problems first start when his apartment is taken over by his best friend who's supposed to be in India. The thing is, it's not her, it's the version of her that he'd put in his book. Strange things start happening, buildings disappearing and new ones appearing in it's place. People stop existing. He's thrust into a world he's created, and he's the main character.