Which Author is the Right Author

I've written quite a lot in the past about the problem of distinguishing people with the same name who have written books. Alex Beam wrote a dead-on, accurate, funny column about the problem.The difficulty is that book information is all about the ISBN, not about normalizing and aggregating other factors. I've been working for years isbn.nu to improve on this problem, but it's a hard task for a single human being because it requires so much information and so much manual work to figure out which books belong to which authors.