Resources material is continually updated. That said, our core textbook is likely to remain for sometime (until I get round to writing one!).
Other useful material
Meadows et al Limits to Growth 1972. A pdf of this book can be downloaded here.
Jared Diamond, Collapse: How Societies Choose to Fail or Succeed
In the library: 8 copies of 2011 edition, 3 copies of 2006 edition – (HN 13 DIA)
Tim Jackson, Prosperity Without Growth
7 copies are available in the library (HC 79.E5 JAC).
An online lecture is available here.
Mitchel Resnick, Turtles, Termites and Traffic Jams: Explorations in Massively Parallel Microworlds.
10 copies are available in the library (QA 76.58 RES)
A Google Books preview can be found here.
The Millennium Project identifies 15 global challenges for humanity. An overview of the challenges can be found here and here. In addition, there is a special edition of the journal Foresight entitled: ‘The Millennium Project & Beyond’ (2013) (vol 15, issue 5). The full text can be accessed via the library. The Conversation also has a column on the Millennium Project.