OK, I think you are trying to do something very special. I'm not sure what.
Possibly some form of "fingerprinting" in a social experiment with sharing, designed to allow you to trace books back to the source?
First there were 66 identical sets of 300 books, but with different fonts. Now it is also sets based on author and ratings?
It would be fun if you could be more specific about what you are trying to do.
