Filter your results by selecting "UW Libraries" from the drop-down menu beside the search box. This will limit your results to ebooks that can be accessed at UW. Then select the filter "eBooks" under the Resource Type options on the left.
You should now see only items that are ebooks available at the University of Washington.
Click "Access Options" to see more information.
Click on the link next to "Content available" to access the ebook.