Kindle is good for reading. However, the A4-size technical/academic paper is pain to read on Kindle 5—the fonts are too small. The “email to Kindl” converting tool provided by Amazon usually loses the formats in the technical paper. How to convert A4 paper format to read on Kindle 5?
On Linux, it is usually one single command to convert the paper PDF to the version suitable for Kindle. My favorite option combination is:
$ k2pdfopt -dev k2 -as -x -ui- /path/to/your/pdf/file