Lars Kepler is the pen name of a married couple from Sweden . You ca n't share your inner world with anybody for years while you 're writing a novel . ` ` The Hypnotist '' has become a best - seller in 36 countries and is being made into a movie . Lars ##son 's brother is a hypnotist and did illustrations for the book . ` ` Lars '' in Lars Kepler is an homage to Swedish author Stieg Larsson .
Lars Kepler is the pen name of a married couple from Sweden . ` ` The Hypnotist '' has become a best - seller in 36 countries and is being made into a movie . Lars ##son 's brother is a hypnotist and did illustrations for the book . ` ` Lars '' in Lars Kepler is an homage to Swedish author Stieg Larsson .