This is really fun. Check out the Literature Map, an interactive mapping/association/related genres and authors kind of search tool. You just type in the author's full name (just last names don't seem to work really well), and then you'll get an animated flurry of related author's names that write in the same content area or style of your selected author. This is a great way to make a library list. As the site says, "The closer two writers are, the more likely someone will like both of them." You just click on a name to travel along in the literary stream. For instance, I searched for Charlotte Bronte, and just a few of my related authors were Jane Austen, Charles Dickens, and William Shakespeare, with the next author on the list in the column to the right being Michael Ondaatje who wrote The English Patient and Anil's Ghost among other works.

Related: There's so much good literary stuff on the Web. My list of arts and humanities resources on the Invisible Web is a good introduction.