Death in Dark Glasses — George Bellairs

The disappearance of a reclusive widower sends Detective Littlejohn on a far-flung hunt for a killer in this classic British mystery.

It was meant to be a fool-proof scheme. The victim was someone who wouldn't be missed, yet even the most meticulous criminals can make mistakes. When questions about a minor case of fraud lead to a missing persons case, the local bank's chief inspector calls in Detective Littlejohn to investigate.

It seems that a bank customer has disappeared just after withdrawing a large sum of money. The only clue to his whereabouts is a note on his front door saying he'd gone abroad. But when they discover the man's brother had been murdered, Littlejohn realizes something sinister is afoot.