

An English-language stage adaptation premiered in 2013. An English-language film adaptation titled Let Me In, directed by Matt Reeves, was released in 2010. A Swedish-language film, Let the Right One In, directed by Tomas Alfredson, was released in 2008. The book was a bestseller in the author's home country of Sweden and was translated into several languages, including English. The book focuses on the darker side of humanity, dealing with thematically heavy issues such as existential anxiety, social isolation, fatherlessness, divorce, alcoholism, school bullying, pedophilia, genital mutilation, self-mutilation, and murder.

It takes place in Blackeberg, a working class suburb of Stockholm, in the early 1980s. The story centers on the relationship between a 12-year-old boy, Oskar, and a centuries-old vampire child, Eli. Let the Right One In (Swedish: Låt den rätte komma in) is a 2004 vampire fiction novel by Swedish writer John Ajvide Lindqvist.
