Actually, "Alas, Babylon" is a terrific book by Pat Frank, which
came out in the late 60s, which I recommend to anyone. Great reading.
Since first reading it as a kid, I must've reread it a dozen or more
times over the years until the darned thing fell apart. (Paperback.)
While at Worldcon, I picked up a first-edition hardcover of the book,
and started reading it again while I was there...and fell right back into
it again.

jms