All products featured here are independently selected by our editors and writers. If you buy something through links on our site, Mashable may earn an affiliate commission. Kindles used to only ...

Kindle devices appeal to many people. When everything works, they're great. But Amazon is becoming more and more finicky, both in terms of supported formats and the freedom to manage your own books.

The major advantage to PDF files is that you can distribute documents to a wide variety of platforms, including the Amazon Kindle. While the Kindle opens most PDFs with no difficulty, you can run into ...