Of course, it's not as simple as the subject sounds.
I borrowed my daughters Kindle and purchased a book on it, using her account. A few weeks later my family gave me an IPad for my birthday. How do I transfer my book from her Kindle, under her name, to my IPad? Thank you.
Just Download the Kindle app from the app store then open the app and sign in to the account using the username,password of your daughter.