Earth Abides is a scifi book where a super-virus has wiped out most of mankind (back in the 40s, after ww2) and this guy and a few thousand people scattered all over are the only ones left. It shows his life until he dies, how his newly created civilization worships his favorite hammer, and the effect of massive stores of canned goods on his children. It also shows how mankind's impression on Earth, such as roads, decay over time and descend back into brush.
