“Misterioso” opens a series of novels by the Swedish virtuoso of the detective genre Arne Dahl about the investigations of “Group A”. In quiet, sedate Stockholm, a serial killer is hunting oligarchs, and the frightened Swedish State Criminal Police creates an elite team of investigators under the leadership of the experienced Jan-Olov Hultin. They must neutralize a mysterious criminal who sneaks into the mansions of his victims at night and kills them with two shots to the head to the sound of jazz. Pretty soon, three things become clear: on a magical summer night in 1958, record director Ray Fowler got drunk during a Monk concert and did not turn off the microphone in time; a split suddenly appeared in the mysterious Order of Mimir; a girl who worked as a golf caddy committed suicide. Perhaps these are all links in one chain, perhaps a series of random coincidences. Readers of Reader's Digest magazine named Arne Dahl the best author of action-packed detective stories.