OK->
This would have been published in the late sixties I think
(but may be as late as '75, which is when I read the darn thing:
If that is so, it was likely a Laser Book:
link
It is _not_ however "Renegades of Time"
)
The theme of this book was time travel,
and the hero was a joe-blow who ( it was predicted)
would destroy the 'bad guy',
who just happens to be the Very Last Human
I remember the Very Last Human being described as
an all-powerful source of All Evil,
determined to destroy Everything
( especially Joe Blow & his seductive girlfriend)
The Bulk of the book (IIRC) is
various encounters as joe-blow escapes 'just in the nick'
from the Last Human's time-traveling clutches,
I also recall several staemy passages dealing with Joe and the GF.
The Pay-Off comes at the Final Encounter,
where the Last Human turns out to be a perfectly reasonable fellow,
and that (IIRC) all of the bad press associated with him is essentially
transferance of Humanity's fear of extinction (kinda like 'Childhood's End').
The only part I recall with any kind of crystal clarity
is the final scene, where The Last Human instructs Joe-Blow that;
(since it has been Prophesised that Joe Blow will, in Fact: kill the Last Human)
Joe should insert 'the needle' just there, under the Jaw and into TLH's brain
(which joe-blow does feeling guilty and set up about the whole thing).
.there may or may not be some sort of Adam/Eve parallel as
joe-blow and his girl-friend are now at the 'End of Time'
.
I also recall the cover was somewhat on the trashy 'mens magazine' side,
and could certainly have been Freas (supporting the Laser Books idea).
Anybody gotta clue what I'm talking about
?