Inspector French and the Sea Mystery — Freeman Wills Crofts

When a dead body is found at sea, the case can only be solved by the astute Inspector French, and his most discerning readers, in this Golden Age mystery.
 
A mysterious shipping crate is hauled ashore off the coast of Burry Port in South Wales by two fishermen, who find a brutally murdered, decaying corpse inside. Stumped by the lack of clues, the local police call in Inspector French of Scotland Yard, one of the Criminal Investigation Department's finest detectives. With his meticulous pursuit of leads, it's only a matter of time until Inspector French finds the killer.
 
Praise for the writing of Freeman Wills Crofts:
 
“One of the classics of modern crime fiction.” -- The New York Times
 
“The soundest builder of them all.” -- Raymond Chandler