or Preload a tablet like the Amazon Fire 7 with my books or any other apps and sell it at any price you want.
To create an account in the Amazon store that you must sell with the tablet, you can use the tablet's serial number as part of email address using https://www.mailinator.com
Give this email to the customer to use after deleting your credit card from this amazon account and tell them to change the amazon password you gave them. Mailinator has no password and can be reused anytime by the customer even though emails are deleted after a few hours.
To create books you will need a Windows10 PC with 2 monitors.