Serviceable part-time-detective story set in the world of rare-book collecting and presented in the Thin Man style. (The writer, Harry Kurnitz, later contributed to the 4th and 5th Thin Man movies.)
Points for premise and some good one-liners ("I request the pleasure of your absence"); unfortunately, the leads wear their roles with all the comfort of sackcloth. Robert Montgomery's transitions between lighthearted husband and tough-guy sleuth are awkward -- like he was just rehearsing to be Lord Peter Wimsey in "Haunted Honeymoon" a year later -- and the usually superior Rosalind Russell as a "wifey" isn't sharp enough for the Nora Charles league.
Otherwise, it's an OK way to kill some time on a rainy afternoon ... but I wouldn't waste 1.5 hours of videotape to watch it later.