That has little to do with the fact that they are ebooks, and everything to do with the fact that they are about data science. Just about the sexiest 'academic'

That has little to do with the fact that they are ebooks, and everything to do with the fact that they are about data science. Just about the sexiest 'academic' topic right now, and in extremely high demand outside academia. For the vast majority of academic books, there is simply little or no demand.