Looking for a book I read in elementary school

[HurryHeathen]

The plot if I remember it correctly was about 2 people sharing a small piece of land together after a nuclear fallout. They couldn't go outside without suits on. The people i think at the start were not living together. I know not much to go on but I do remember really enjoying it.

 

[WickedWitch]

There are many post-apocalyptic books, but you may be looking for this one:

Z for Zachariah

by Robert C. O'Brien

Pub. Date: April 1987

"Sixteen-year-old Ann Burden has been living on her own for a year, since the nuclear bombs turned everything surrounding her little valley into a wasteland, and her parents drove out to find other survivors... and never came back. Knowing she may be the only person left, Ann struggles with her loneliness and tends to the farm as best she can. But then a man comes over the hills in a protective suit and arrives in the valley. At first he provides Ann with welcome companionship, but as he recovers from a bout of radiation sickness, his actions become more sinister."