Slow Train. The Slim Hardy Mystery Series, #4

On the evening of Saturday, January 15th, 1977, a local commuter train is delayed at a small village station by a freak blizzard. Young nurse Jennifer Evans, keen to get back to her family, plans to walk the last couple of miles to her home in a neighbouring village. She phones her daughter to confirm that she's on her way, but she never arrives home. In the ensuing police investigation, no trace of Jennifer Evans is ever found.
The only evidence is a photograph taken by a fellow passenger of footprints in the snow in front of Holdergate station. It appears someone was fleeing for their life.. Contacted by Jennifer's daughter, at first it seems private investigator John "Slim" Hardy has no chance of solving a forty-two-year-old mystery. But as the case begins to unravel, Slim finds himself caught in the centre of a whirlwind which will send him spinning to a dramatic conclusion.