The Kindle mobi books have issues too. For whatever reason, Amazon thinks it's acceptable to sell mobi books where the code samples are barely legible on a Kin

The Kindle mobi books have issues too. For whatever reason, Amazon thinks it's acceptable to sell mobi books where the code samples are barely legible on a Kindle paperwhite. I've had this issue with some O'Reilly and Manning titles ported purchased from Amazon in Mobi format.