Put detectives in a coffee shop and a subgenre has been declared before the first body turns up. The Coffee Shop Detectives belongs to the cosy end of crime writing, where the amateur sleuth works from a fixed and comfortable base, the community supplies both suspects and witnesses, and the pleasure lies in watching ordinary people apply themselves to something extraordinary.
Louise Mumford arrives with us through that novel, filed under crime and thriller alongside general fiction. Eleven hours is generous for the form, which usually favours brisk, and the extra room tends to go exactly where cosy crime is at its best: into the characters who are not suspects, the routines of the place, and the slow business of making a small world feel properly inhabited.