CCENT ICND1學習指南：考試100-105第3版，Kindle Edition
Download Kindle for PC desktop software and install it on your computer. Register your Kindle for PC with your Amazon ID.
Double-click your Kindle for PC to run it. The Amazon kindle books under your account will be synced to it automatically. Double click the book to download it. Verify that all the kindle books are downloaded to your computer. The downloaded books are in "Downloaded items" but not in the "Archived items". Click to open the books to read, and make sure that they can be opened and read normally.
sync kindle books
The downloaded kindle books are usually saved in "X:\Users\User name\Documents\My Kindle Content", if you don't want to find them by this way. You can directly click on the "Tools" on the top left part of the program and then select "Options". A new window will pop up, click the "Content" option, you will see the content folder information.