These reference books are great starting points; most of them are non-circulating without special permission, so they stay in the library.
Links to SU Libraries Holdings by Library of Congress Classification Subject Heading
Sustainability issues can cross many disciplines. These links will connect you with library books based some of the most common Library of Congress cataloging terms for sustainability and sustainability related issues.
Ecotourism Sustainable Agriculture
Environmental Engineering Sustainable Development
Environmentalism Sustainable Forestry
Browsing the Library Collection
Below is a list of call number ranges that you may find helpful for your sustainability research.
GE25-35 Communication in Environmental Sciences
GE42 Environmental Ethics
GE50-56 History of Environmental Sciences
GE70-90 Environmental Education, Study and Teaching
GE105 General Works
GE123 Handbooks, Manuals, etc.
GE140-146 Environmental Quality and Degradation
GE149-160 Global Environmental Change
GE170-199 Environmental Policy
QC882-994 Atmospheric Pollutants & Greenhouse Effect, Global Warming
QE38 Environmental Geology
QH72-77 Nature Conservation, Landscape Protection
TD169-1066 Industrial Environmental Protection and Control