To find ebooks, you'll first want to perform a search in Scout. Then, on the results page, limit your results to ebooks by selecting the "eBooks" tick box from the Limit To menu on the left hand side of the page.
You can also search within a specific eBook collection, which can be helpful for doing subject-specific ebook searches.
If you are looking for a more browsable collection of ebooks to read just for fun, we recommend using the Tuscaloosa Public Library's collection. UA students can get a full library card for free.