The Stately Home Murder (Rue Morgue Classic British Mysteries)

At a stately home, now open for public tours, a young boy lifts the visor on a suit of armor - and finds a face staring back at him! Inspector C. D. Sloan and his wisecracking sidekick, Constable Crosby, Catherine Aird's two popular sleuths, must figure out who stashed the body and why.