A Question of Proof
by Nicholas Blake (Harper and Brothers, 1935); audiobook read by Kris Dyer (Bolinda, 2015)
As much middling school story as murder mystery, the untangling of which rarely stirs the reader beyond mild interest. Poetry-quoting gentleman detective Nigel Strangeways elevates the story but makes his appearance late and lacks a sidekick to unpick his seemingly capricious actions.