From The Digital Reader:
Despite of hopes to the contrary, Amazon has largely ignored the Polish ebook market. It has no local Kindle Store there, and doesn’t even support Polish as a language option in KDP.
A new survey suggests that may have been a mistake.
The research institute ARC Rynek i Opinia revealed earlier this year that 2/3 of ebook users in Poland use the Amazon Kindle., with Pocketbook and Poland’s own InkBook brand coming in distant second and third place (11% and 7%, respectively).
. . . .
Mystery and crime novels were the most popular genre among Polish ebook readers, followed by fantasy, horror, and how-to books.
Link to the rest at The Digital Reader and thanks to Nate for the tip.