More and more, the library is getting eBooks over print books, especially in fields like technology. Here are just a few from the last couple years:
Some books are only available as ebooks. You can access tens of thousands of ebooks through the University.
Ebook Central is a good, easy to use ebook collection. We recommend starting here.
UAA's eBooks page lists other options. It has a search box to search all ebook sources at once, as well as links to individual eBook collections that you can browse through.