Thanks for your work! I had already downloaded the entire dataset. But I wonder what was the criteria behind book selection? I found it difficult to understand at places*.

* Sometimes a book has several very slightly different versions. A lot of Fantasy. Sometimes many parts of a series are included but not all of it (I can imagine an argument for a sample, or for the series in its entirity). Commentaries about important philosophical arguments like Rawls' 'A theory of justice', but not the work itself.