[tterranigma]

I have been considering buying an ebook reader for a long time. I do not know what exactly is going on with the technology. What I would like to have is a device with the following characteristics:

- Not vendor-locked. I would like to be able to load my own books, sync them as I wish, not share any detail about anything with eg Amazon, etc

- Support annotations BUT also saving them together with the file. What I do know is that I read PDFs on my laptop, annotate them and then simply hit save and my annotations are bundled together with the pdf.

- I do not know if the above is a file format issue. In case it is, is there a device that has nice pdf support with annotations?

- If not, is there a workflow (perhaps using calibre) so that I can take the pdf/mubi/etc file together with the annotations file and combine them into one?

A question related to the above, should I not prefer the pdf format for any reason?