What kindle version do you have?
You need to connect your kindle to your computer using a USB cable and transfer the PDF to the kindle books folder.
Because the eBook is not in kindle compatible format, some images and code may show up out of place. Apart from that, I think you can be read on kindle just fine.
Which courses would you like to read on your kindle?
I think Rui has some of our courses in .epub format (except the latest Build Web Servers eBook).
Let me know if you are able to do it.