I just discovered that there is no way for a user to give a gift book to another user - at least on-line. My wife has a separate account for some of her books - though she shares my Bible Study library when she need it. I wanted to buy a book for her, but there was no way to do so without knowing her username (it is her email, I think) and password (which I do not know).
Amazon allows gift giving - why not LOGOS?