Keyword searching is going to be the best path for EBSCO usually, but there is also a way to browse content. The browsing options are available when opening the EBSCO eBooks homepage. If you've navigated away from the homepage, do the following:
Clicking on any topic in the list will bring you to a normal EBSCO search results page, showing titles available for that topic.
Please note this option is only when searching EBSCO eBooks directly and is not available from EBSCO Discovery Service.