Literature Map is as its name suggests,a service that provides names of authors based on your search keywords. If you like an author and constantly read his works and want to discover other similar authors that more or less have the same style of writing or probably focus on the same themes as your original author then all you need to do is type in the name of the author and Literature Map will provide you with a diagram like map of the names of other similar authors.
This is a cool website for teachers. They can use it with their students to look for authors similar to the ones they have in their curriculum. I would also recommend another website which slightly resembles Literature Map, it is called Novels on Location. This latter allows users to find novels based on the locations they type in in a map. Check it out too you might like it.