Reddit reviews Professional Cooking, 9th Edition

I had to switch to the Amazon.com link to see which Kindles it would work for (I'm not in Canada).

https://www.amazon.com/Professional-Cooking-9th-Wayne-Gisslen-ebook-dp-B07CVLVK5R/dp/B07CVLVK5R/

This is what it says:

>Read with the free Kindle apps (available on iOS, Android, PC & Mac) and on Fire Tablet devices. See all supported devices
>
>Fire Tablets
>
>- Kindle Fire HDX 8.9''
>
>- Kindle Fire HDX
>
>- Kindle Fire HD (3rd Generation)
>
>- Fire HDX 8.9 Tablet
>
>- Fire HD 7 Tablet
>
>- Fire HD 6 Tablet
>
>- Kindle Fire HD 8.9"
>
>- Kindle Fire HD(1st Generation)
>
>- Kindle Fire(2nd Generation)
>
>- Kindle Fire(1st Generation)
>
>- Fire HD 10
>
>- Fire HD 8
>
>- Fire
>
>Free Kindle Reading Apps
>
>- Kindle for Android Phones
>
>- Kindle for Android Tablets
>
>- Kindle for iPhone
>
>- Kindle for iPod Touch
>
>- Kindle for iPad
>
>- Kindle for Mac
>
>- Kindle for PC
>
>This title is not supported on Kindle E-readers or Kindle for Windows 8 app. Learn more
>
>To read this title on Windows 7, 8, or 10, you can use the Kindle for PC app.

I see this a lot with textbooks, unfortunately. I'm not sure why. Are they formatted differently? (I've never purchased a textbook on Kindle.)