After submitting a search, use the filters on the left side under "Available at Cal State LA" to narrow your search to Full-Text Online, and Books under Resource Type (you may have to click show more to see books).
Under "Full text available at," click the link to access the book. Check the user options- some books have unlimited access, but others can only be used by one person at a time and may require you to check back after the other reader has left the book.