The open-source EPUB e-book format is great for sharing books between different readers and making life easier on readers generally--but Amazon's Kindle, the big player, doesn't support it.

The Kindle Scribe is a new hybrid e-reader and e-note. You can view and edit PDF files, freehand draw and also conduct handwriting notes in Kindle books. PDF files are a different beast on the Scribe.

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 ...

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