Each Kibook should take between 4-10 minutes to add, depending on Wi-Fi connectivity. The process may be faster if you are closer to your Wi-Fi router.
Please note that all Kibooks will be added to your wand the first time the process is initiated. To pause adding Kibooks, tap the 'Finish This Later' button.
You can also pause by pressing the big green button on your wand, then pressing it again to begin reading.