How about then giving the user a list of works by that author via amazon? If the users really do want to read more of that writer's stuff, this might be a good way to get some affiliate business. You could possibly even point to specific works that they "write like". You might also take a look at the goodreads api (http://www.goodreads.com/api) for some possible social networking aspects? Maybe you could show people reading things they write like via goodreads or something along those lines.