As many as you want. There may be a limit to the number of devices on one account a book is allowed to be read on, but I don't think Amazon cares how many actual Kindle devices you have. You may actually have more than you think.
You have a Kindle device if....
- You have a Kindle (generation 1, 2, 3 or DX)
- You have an iPhone with the Kindle app installed (and linked to your Amazon account)
- You have an iPad or iPod touch with the Kindle app installed (and linked to your Amazon account)
- You have any one of the various Android phones with the Kindle app installed (and linked to your Amazon account)
- You have any of the various Android tablets with the Kindle app installed (and linked to your Amazon account)
- You have a Windows PC with the Amazon app installed (and linked to you know what)
- You have a Mac PC with the Amazon app installed (and linked to you know what)
This is actually a great way to share books in a family. Everyone decide who's Amazon account to use. Make that person the one in charge of "purchasing." Anyone who wants a book, send that person a nice fat Amazon gift certificate to cover the expenses of the book/books they want. Once the book is purchased, everyone in the family can read it on their respective "Kindle devices." Eventually you will have a very well rounded family library, with all the books you collect. Not everyone will like the same thing, but you will be surprised how many they will.
It works at this house. We have taken it to the level of "great family activity!"
And of course... shameless promotion below.
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