Antidote to Venom
by Freeman Wills Crofts (Hodder and Stoughton, 1938)
audiobook read by Gordon Griffin (Soundings, 2015)
A remarkably long and tedious book. Crofts spends the first half establishing the unlikable viewpoint character and his motivation for murder. Even once this occurs, Inspector French is held back until the final third. No suspense, let alone mystery, just utter banality.