The Laughing Policeman - Maj Sjöwall and Per Wahlöö

Book 4 in the Martin Beck series does not disappoint. I know it's considered the Beck series, but we do learn a lot about the other cops he works with, so it's more of an ensemble cast than one might suppose. I will call out some dated Freudian style psychology that I don't think holds water, but other than that, this is a well plotted police procedural and I really enjoy these books.