The story of the vampire fiction novel “Let the Right One In”: or, “Let Me In” is centered on the relationship between Oskar, a 12-year-old boy, and Eli, a centuries-old vampire child. Either of them is a victim – in his own way, and they both need to help each other. The myth that the vampire can not enter a house unless they're invited by the owner, is transformed by the author into a little eerie but touching symbol of the proximity and trust.
The book was filmed twice: a Swedish-language film version by the same name, directed by Tomas Alfredson, in 2008 and an English-language film adaptation under the title “Let Me In”, directed by Matt Reeves, in 2010.
“Let the Right One In” was a best-seller in the author's home country and has been translated into several languages.