Threshold of Eternity

<b>From the first page of the Ace first edition:</b> "Beyond the time curtain lay galactic victory - Because of a twist in the structure of Time, three strangers were brought unexpectedly together: Red Hawkins of California, Chantal Vareze of London, and a man from the 41st Century. Their meeting seemed an impossible prank of a universe gone mad - but it turned out to be quite otherwise. <p>For it seemed there was a war going on throughout space and time. A war fought by men of different epochs, on planets of different cultures, but for a cause that all could acknowledge - the very continued existence of creation itself. <p>And the coming together of these three very unlikely people - a modern man, a lovely girl, and a futurian soldier - was to prove the master stroke of a super-science strategy that had already brought humanity to the <i>Threshold of Eternity</i>."