[kevinr]

Amazon have a huge pile of different publishing imprints, see:

https://en.wikipedia.org/wiki/Amazon_Publishing

And that's just original imprints; it doesn't list things like Audible, which Amazon owns, and which are THE major audiobook publisher, but almost always published secondary to a print publication rather than original.

And that's not including Amazon's multiple self-publishing options, including the Kindle Direct program.