The Thin Man by Dashiell Hammett (1934)

About 240 pages Nick Charles seems to find trouble wherever he goes. He thinks his sleuthing days are behind him when Julia Wolf, a former acquaintance, turns up dead. Nick—thanks to some persuasion from his enchanting wife, Nora—finds himself falling back into old habits and making a few polite inquiries. The prime suspect, Julia’s lover and boss Clyde Miller Wynant, has vanished without a trace. Everyone is after him, but Nick is not so sure Wynant is the culprit. And when another dubious figure bursts into their bedroom, waving a loaded handgun, it seems Nick and Nora’s adventure is only just beginning. Nick and Nora Charles are among Dashiell Hammett’s most alluring creations: a rich, glamourous couple who solve homicides in between wisecracks and martinis. At once knowing and unabashedly romantic, The Thin Man is a murder mystery that doubles as a sophisticated comedy of manners. -Penguin