Through words

A villain slowly falls in love with the reader. It starts out with the main character (the villain) introducing himself. Through the entire book he talks to the reader and falls more and MORE in love with them, but there's another character " the hero" who tries to take the reader away from the villain through the book. And at the end as he is dying he tells the reader how beautiful they are, and to hide the book cause he wants to keep his soul forever.