Ok...
So I will admit it, I am a little confused about syncing my two iPads 2 with my new Mac air. I'm totally new to Os X and still a newbie on iTunes, so adding a second iPad to the equation (a gift to my wife) made things more complicated than I thought.
I decided to use one login account on my Mac air so when wife has to sync her new iPad, she connects the device and we just ensure her login is there. So far, so good.
My main question is: on iTunes (left menu or options), what is the difference between "Library" and "Store" ? Is "Store" and its content, and online catalog? Or in other words, if I delete something from "Purchased", is gone for good, like an Apple book, or I can recover it later?
What happens if I delete a book or a song from "Library", can I re-download it again later?
I'm a bit confused ...