If you have a digital copy of the book, can't many people read it at the same time? I know that when I finally put the kindle app on the computer, I can access any content that is on my daughter's kindle and when (or if) I get a kindle for Chistmas I will have 2-4 copies of anything we buy (2 kindles, the pc and the laptop). Maybe you should just think of it as buying 2 or more copies of each book for that $8-10. You can even find a LOT of e-books for free or cheap.