“Parable of the Sower” by Octavia Butler is an excellent read. This book is about a dystopian future United States. The cities are walled off and mankind is plagued with disease and mental instability. Lauren Olamina is an 18-year-old teen with the abilities to feel the pain of others. She chooses to leave her home and this is a story of her journey.
“A Gift Upon the Shore” is another good novel. It was written in 1990 by M. K Wren and relies strongly on a fundamentalist philosophy. The story is set in a world of post nuclear holocaust. There are two female protagonists who struggle with survival through the diseases and nuclear fall-out.
Another dystopian fantasy is “The Slynx” by Tatyana Tolstava. This novel was written in 2000 by the Russian author and was translated into English in 2003. The story begins 200 years after “the blast” and the society which evolves is evil and dangerous.
A novel which has new life, due to a recent movie adaptation, is “The City of Ember” by Jeanne DuPrau. Ms. Duprau’s novel was published in 2003 and has the same post-apocalyptic end-of-the-world theme. The society that we know had been destroyed centuries before this novel begins but it is still a great read. The protagonists are children looking for a solution to the lack of energy. Unless they can find a solution Ember will be as dark as the rest of the world.
There are many others including the classics like “On The Beach.” by Nevil Shute “Alas, Babylon,” by Pat Frank, ”Level 7,” by Mordecai Roshwald and “Earth Abides” by George R. Stewart. Hope this helps.