Kindle eBooks Coverage

Hi,

I haven't been reading much for some time, and now trying to prioritise time for books again.

There has been 3 popular books that I had on my list, and when I search on the Kindle store or online, they don't see to be available in an eBook. I'm surprised to see none of the 3 available.

Is there another marketplace that Kindle allows you to buy from.

The first book I am looking for is 'Good To Great' - Jim Collins