How do i transfer kindle books to my sony ereader?

Query by Josie: How do i transfer kindle books to my sony ereader? In class i had to download a kindle app for my mac to download a guide that I need to have to study. How can I transfer the book from my kindle app on also my Sony reader? Finest answer:
Response by Dylan
Transfer them with the USB wire using laptop or computer as the middle males....
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