Spent an enjoyable afternoon finishing another book of the "British Library crime classics" series, "Death in the tunnel" by Miles Burton.
A well constructed and written classical whodunnit, allows you to speculate at the same time as the detectives, just as I like it. My guesses were all correct. Highly recommended!
Seeing the author wrote about 140 crime novels I'm in serious trouble
(well, will finish the Bellairs series first.)