Former military engineer Manse Everard is recruited by the Time Patrol to prevent time
travelers from making major changes to history (history bounces back from the small
stuff).
For me, the logic of these stories pushes in a good direction, but still leaves one
gaping hole that’s evinced by the fate of Manse’s compatriot Keith Denison in “Brave to
Be a King”—namely, what happened to the younger Denison? Perhaps my problem is simply
that I don’t grok ℵℵ-valued logic.
The stories have been
collected in various volumes, the most complete of which is the 2006 Time Patrol that
contains all but The Shield of Time.
If you went back to, I would guess, 1946, and worked to prevent your parents’ marriage
in 1947, you would still have existed in that year; you would not go out of existence
just because you had influenced events. The same would apply even if you had only been in
1946 one microsecond before shooting the man who would otherwise have become your father.