How does kindle reader download comics?

Comics can be downloaded from Amazon e-book mall built in kindle, but it is not free. But if you look at the system, you can read comics directly in it.

If you have already prepared a compressed comic package on your computer, there are two ways to transfer it to the kindle. One is to copy directly with the data cable, and the other is to see your Amazon account email in the kindle settings and send the compressed comic package to that email.