Angels and Demons by Dan Brown.
Moby-Dick by Herman Melville.
1984 by George Orwell.
Frankenstein by Mary Shelley.
Joyland by Stephen King.
All of them are just really good books. There's a book for everyone out there, I'm sure. And if there isn't, it's only a matter of time 'till a niche book for a niche interest gets written.