Man in Duplicate — John Russell Fearn

Playboy millionaire Harvey Bradman is set an ultimatum by his fiancée: before she marries him, he must carry out some significant, courageous act. Amazingly, the next day the newspa­pers carry a full report of Harvey's heroic rescue of a woman from her stalled car on a level crossing! But Harvey had been asleep in bed at the time of the incident. And when his mysterious twin seeks him out, he becomes enmeshed in the sinister cosmic conspiracy being waged by his alien doppelganger...