For fans of Le Carre's book there are changes and the book's somewhat meaty storyline has been pared down, but the key events are here (if moved to a different setting).
To say I was looking forward to seeing this film would be something of an understatement.
Every so often a film comes along that transcends genre clichés so completely it defies classification. Tomas Alfredson’s Let the Right One In is one such film.
Other vampire films have played on the "have-to-be-invited-in" aspect of the mythology (notably 1987 classic The Lost Boys).