A. E. W. Mason 
Watchers 
A Novel

A rowdy soiree hosted by Lieutenant Clutterbuck is beginning to wind down when a young boy appears and captivates the revelers with a tale about a father-and-son duo with whom the lieutenant is acquainted. It turns out that the pair are master thieves. Though the boy’s story ends on an ambiguous note, Clutterbuck begins to wonder if he might be the next target.