eBooks are digital books, some of which you read on the Web, and some which are available for download either to your computer or to e-readers such as a Kindle. Most of these collections are subscribed to by CSULB, so you will need a CSULB ID to use them. Some are free to the public.
All CSULB ebooks can be found in OneSearch.
Many of the free books online are public domain, including titles published before 1923 and U.S. government documents.