This is the kind of novel that the more radical and pessimistic elements of the Intergovernmental Panel on Climate Change (IPCC) would put on everyones "must read" list. One could substitute the words This Book for Climate Change in the following passage and you get an idea of Piercy's vision -

"Ominously, Climate change plays into the scenario, thoughtfully explored by Naomi Klein, that the community of multinational corporations will seize on the coming catastrophes to elbow aside governments as agents of rescue and reconstruction -- but only for communities that can afford to pay. This dark vision implies the increasing insulation of the world's wealthy minority from the rest of humanity -- buying protection for their fortressed communities from the Halliburtons, Bechtels, and Blackwaters of the world while the majority of the poor are left to scramble for survival among the ruins."

Piercy wrote the book back in 1993. Its a very impressive piece of work. The story is intriguing and the many erotic scenes evocative and thoughtful.
Freaky love amongst the ruins -because there is nothing else left.