One of the notable horror fiction books from the 2000s is 'The Conjuring: The Official Case Files'. It's based on real - life paranormal investigations, which makes it even more terrifying. Also, 'House of Leaves' by Mark Z. Danielewski is quite unique. It has an unconventional format and a very spooky narrative that plays with the idea of a haunted house in a very different way.
Sure. 'The Ruins' by Scott Smith is a great one. It has a really creepy atmosphere as it tells the story of a group of tourists who find themselves in a strange and deadly situation in the Mexican jungle. Another good pick could be 'The Girl Next Door' by Jack Ketchum. It's a disturbing read that delves into the dark side of human nature.