In response to a student request, we recently put a new WPI Library Catalog quick limit in place to retrieve results only for books. You can also limit your searches to display only items published within the current 10 years, Videos OR DVDs, electronic books, WPI Project Reports (IQPs or MQPs) or WPI Theses and Dissertations. When viewing results, notice on the right that you can click to limit results to these specific types. To combine these limits, use the Advanced Search tab.
Another useful feature is the Sort by option. Use when viewing results. Choose Publication Date Descending instead of Relevance to quickly view the most current items at the top of your results list.