my wife and i share a kindle3 account and we have over 300 books that she can dload onto her kindle and iphone at ant time she wants and i dload the books on my kindle3 and my ipod touch , and whats nice is you dont have to put the books you dont wanna read on your device, while my wife and i read mostly the same books she does have a few sappy ones that i dont read, and she doesnt read some of my alternate history books.