See the tabs near the top of your screen? The second from the left is eBooks. Click on that. You have options of which format you would like to browse within, or browse, which gives all formats. At the top of THAT page, is the alphabet, so you can click on ta particular letter...ie 'C' for Agatha Christie. You can also select the genre of books you may be interested in as well.
Have fun...many folks have spent countless hours creating this incredible library for us to use...enjoy.