^
They do have a search function, so while that's not optimal, it does bring up all the works of a particular author one might be interested in.
Or there's the option of doing Ctrl-F in the browser on the
full list of author name links, which does helpfully tell you how many of an author's works are actually in their catalogue.
Mind you, it doesn't help with the occasional misspelt name, but then that could happen on any store's website.