This book was gripping and interesting, if a little dated. The best way I've been able to describe it to others is as "speculative nonfiction". I was disappointed that their main takeaway at the end is that we need to drastically reduce earth's population, although they stressed by humane means. I suppose what else was I expecting from a book centered around the premise of "what if humans disappeared".

I most enjoyed reading about abandoned places and the ways that they decay. I was a little disappointed that the section on art didn't get more philosophical, but again, the limits of the scope. Overall good, will recommend.