Natural Flights of the Human Mind by Clare Morrall

24 years ago Peter Straker caused a train accident, killing 78 people. To escape the press and angry relatives of the dead, Straker is forced into an isolated life in a crumbling lighthouse.
Dreams about the victims and his own obsessive research into their lives are his only company until he meets Imogen, who has her own painful past. Slowly the two of them begin to thaw.
Any transport disaster dominates the news in the short term but how does the person who caused the accident cope in the long term? Morrall’s novel explores this theme brilliantly.