John Ajvide Lindqvist - Let The Right One In

Let The Right One In works as both genre piece and literarily-edged fiction, though much of its impact was probably spoiled by my having seen the immaculate (and, in some respects, admittedly quite different) film adaptation. That said, I'm glad I came across them in the order that I did - the book is very good, but the film, I think, verges on greatness.