This site in an experiment in community building for sustainability science. Our immediate goal is to invite sustainability science researchers to join us in developing a monograph on sustainability science: its foundations, current findings, and future challenges. The intended audience for the monograph is scholars and graduate students seeking a synoptic perspective on a field that has too long remained less than the sum of its many impressive parts and programs. Our basic strategy is that the monograph should be open access (so everyone can benefit), modular (so users can select what they need and ignore the rest), dynamic (so it can be easily updated), and collaborative (so that it can benefit from the wide range of approaches and perspectives of the community). We have seeded the monograph with material prepared as background for a review of the field recently published in Annual Review of Environment and Resources. We invite members of the community to join us in a continuing effort to improve and extend this initial material through editorial comments, suggestions regarding new material to add to the monograph and longer invited commentaries raising complementary perspectives and interpretations. The site structure allows all readers to see these contributions, engage with them and benefit from them.