Well, to give you a true recommendation, I would like to get some more info from you. I have a Kindle (which I love), my sister has a nook (which she loves), my brother-in-law simply uses the Kindle app on his phone (and he's perfectly satisfied), and I know others who have the Sony, etc., who are perfectly happy with those.
The questions I would ask are: how tech savvy is she?
she's pretty tech savvy, more than i am, and i'm pretty good. Does she want to sideload her books (hook her device to a computer to get the book) or have instant download?
she would just sideload, as we don't have wi-fi at home. If she wants instant download, does she want that available everywhere or only in wifi hotspots? How important is pdf-viewing capability?
hmm...not sure about this one. are lots of books in .pdf format? Does she want touchscreen or a clickable keyboard (also important, as my sister discovered, is that if your hands are too cold, sometimes those touchscreens won't recognize your touch, hee!) for entering notes, searching, etc.?
i don't think she's picky about the keyboard-her cell phone is touchscreen, and she does well with it. Is she a re-reader (in which case she'll want to own, not borrow the books)?
she doesn't often re-read books, but that would be a nice option. Does her library support e-book borrowing? If she will be borrowing e-books from the library, how quickly does she read?
i don't think our library has e-borrowing yet, but she reads pretty quickly, usually a week or less, depending upon her school/band workload.
Library e-books can only be checked out one time per device, if I understand correctly, and since I am a re-reader, I really wanted to keep any books I download. Plus, I visit kindleboards to check out what is currently offered under free books (not just ones in public domain, but others that are available free for a limited time) every couple of weeks. The thread there links directly to
Amazon. I click it, make sure the book is still free, and instantly download. I do this on my computer, and the next time I go to my Kindle and flip the switch, the books download.
Also, just a note: dedicated e-readers are not backlit and are not in color. If she wants a big iPod, that's the iPad -- which is also awesome, but not what I use to read. There are probably more questions that come into play, but those are the ones off the top of my head...