I want to get my wife a tablet for her bday and her sister has the Kindle and wants her to get one too so they can share books. I would like to see my wife get something that is multi-faceted rather than just a dedicated Ereader. 1. Does the Kindle app have full capabilities like that of the Kindle? 2. Will she be able to have full access to her sisters book collection? Her sister thinks my wife has to have the Kindle to gain full access to her collection. 3. What's the best way to purchase a Galaxy without having to buy into a data plan?