There are two main ways to search for e-books at the library.
One way you can search is through PointCat, the library's catalog. If you choose an "Advanced Keyword Search" you can search for a book by its author, title, etc. If you go to the box called "Material Type," you can filter your results to only include e-books.
You can also search for e-books through the eBook Collection, which is an e-book database.