Or at least three of them are back in print. He wrote quite a few others. These three are courtesy of the UK publisher Faber. Rather pricey Kindle editions. Not clear if paperback editions exist.
The Way to Santiago
'A fast-driven, maturely manipulated political thriller . . . Europe is at war - a Fascist coup is imminent as arms are exchanged for Mexican oil.' Kirkus
When newspaperman Henry Van Dyle is assassinated in Mexico City, agency stringer Jimmy Lamson, who was having an affair with Van Dyle's wife, is driven to investigate the mystery of his death. The clues point to a sinister cabal manipulating politics - and orchestrating Nazi interests - in Mexico City. But who is 'Señor Tom', the codenamed personage identified in Van Dyle's notebooks as the man pulling the strings?
Arthur Calder-Marshall lived in Mexico before the outbreak of war and drew on his experiences to lend fidelity to this pacey, suspenseful, superbly written novel, first published in 1941, which Orson Welles tried to adapt for the cinema before making Citizen Kane.
The Scarlet Boy
First published in 1961, The Scarlet Boy saw the versatile Arthur Calder-Marshall venturing into gothic terrain with a study in the paranormal. Historian George Grantley agrees to find a property for his school-friend Kit Everness, now a successful QC, in Grantley's home town of Wilchester. Grantley's eye falls on a place dear to him in childhood: Anglesey House, where his boyhood companion Charles Scarlet lived with his glamorous mother, Helen. But Charles committed suicide there, and some say the house is haunted. Grantley and Everness are undeterred; however, they will come to find their rational views tested, and the lives of their loved ones endangered.