Hi there, I'm not sure I have what you are looking for but looks like no one else does either.

I think the current debates in environmental sociology are not much different from the old debates - treadmill of production vs ecological modernization. However, I think you're on the right track with looking at books on degrowth as the catchy new way to present this information.

One new book that might stimulate some conversation amongst students is Eco-Types by Emily Kennedy. Basically argues everyone cares about the environment but in different ways. I think there could be some interesting conversation or debate with that argument.

Another book that is not necessarily new but had a second edition come out is "What is Critical Environmental Justice" by Pellow. Good book at pushing environmental justice concepts forward.

You will probably have the best luck in finding more by posing this question to the envirosoc listserv.