I am looking for a book that I read many years ago. It is about two enemies traveling in opposite directions through time. ..one forward and one backwards. As they meets at keys points during history they both learn more about why they are enemies and who is the true villain.

  • 1
    Any idea when you read it? Novel or short story? What language was it written in? What did the cover look like? Can you remember any specific 'key points in history'?
    – Rand al'Thor
    Commented Sep 12, 2015 at 11:44
  • Reminds me of The Stainless Steel Rat Saves the World, by Harry Harrison.
    – hindmost
    Commented Sep 12, 2015 at 13:34
  • @user14111 - think along the lines of The Doctor and River Song
    – andrewsi
    Commented Sep 13, 2015 at 12:23
  • possibly the same as scifi.stackexchange.com/questions/151926/… (which is newer but has an accepted answer)
    – Otis
    Commented Mar 6, 2019 at 17:14

1 Answer 1


You're probably thinking of Ben Bova's Orion series.

Orion (or O'Ryan and various other aliases) travels backwards through time, living multiple lives, and he battles an adversary each time. This means that his memories of why he is fighting are all in the wrong order, and Ahriman, the antagonist, knows less and less about the reasons for the conflict as the book progresses.

Now, I absolutely cannot find a good reference for this, so apologies there, but https://sfbook.com/orion.htm covers most of the basics.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.