I never read the original manga, but I have seen a few eps of the anime based off it, and the bullying the poor girl goes through is so over-the-top horrendous, I never wanted to watch or read more.

I know it's won awards and all, but it's just not for me. Nice to see some manga freebies showing up though.
Edit: Also, it's got a list up now of supported devices.
Kindle e-Readers
Kindle
Kindle Voyage
Kindle Paperwhite
Kindle Paperwhite (5th Generation)
Kindle Touch
Free Kindle Reading Apps
Kindle for Android Phones
Kindle for Android Tablets
Kindle for iPhone
Kindle for iPad
Kindle for iPod Touch
Fire Tablets
Kindle Fire HDX 8.9''
Kindle Fire HDX
Kindle Fire HD(2nd Generation)
Kindle Fire HD 8.9"
Kindle Fire HD(1st Generation)
Kindle Fire(2nd Generation)