Edward Abbey wrote The Monkey Wrench Gang in 1975, five years after the first Earth Day, and at roughly the same time that the Vietnam War ended.
The simple premise of the book is four disaffected individuals travel the desert southwest, trying to stop the uncontrolled development of the land by destroying the construction equipment, bridges, and access roads.
Many people find the book entertaining and amusing. Some even think it's a "bible" of sorts, for the environmental movement. Earth First!, the radical environmental advocacy group, was inspired by Abbey, Rachel Carson, and Aldo Leopold.
The writing is fast, entertaining and generally uncomplicated. Any deep, moral introspection takes place outside the book itself, in the minds of the readers.
Go ahead and start reading, and we'll get the actual discussion going in a few days. This should be an excellent discussion!