[ben336]

they made it clear that was "weighted demand" though, so items sold, not items provided. You'd need "Hachette sales through Amazon", a number unlikely to be available beyond Amazon/Hachette employees/execs.

[eugenez]

I wonder if the combination of total Hachette sales weighted by the portion of overall book sales via Amazon would be a reasonable approximation.

[julien_c]

I think it would, but then what would be the portion of overall book sales via Amazon?