One of more than a dozen pseudonyms used by Robert Lionel Fanthorpe and his wife. ISFDB suggests this is the 4th edition but there is no date on the book other than the original hardcover. Wraps marked and creased, edges worn, spine creased, owner's marks, books store stamps, toned pages.
Fanthorpe has written more than 250 books, as well as scripts for TV. He specializes on the occult, science fiction and fantasy.
A freedom fighter flees a nightmarish future dictatorship only to find himself living in the time of Napoleon - while his counterpart from the past finds himself in the future.