Detective Inspector Joona Linna Joona Linna, the charismatic Finnish-Swedish protagonist in the Lars Kepler books, is a Chief Inspector in the Swedish Police Force. This tall, northern man says little but sees and registers everything. Joona Linna is one of the most reliable investigators in the force. He is strong, fearless and doggedly determined. However, this brilliant detective veneer conceals a painful past. The cases he becomes involved in often reflect his own specific trauma, compelling him to seek justice for the victims. Even though he is a highly respected and professional policeman, Joona does not hesitate to use unconventional, sometimes even questionable, methods to solve his cases. In The Hypnotist, he enlists the help of a hypnotist to interrogate a traumatised child, while in the third Kepler book, The Fire Witness, he consults a medium to understand what lies behind a brutal murder. In Stalker, the fifth novel, he goes as far as taking the law into his own hands to solve the case and avoid another killing.