This is a completely diffrent kind of suggestion, but as far as the book is concerned I really think the Revelations Tarot set (deck and book) might be something to consider.
The cards are explained in a very straightforward and direct manner, and the most important bits of the symbology are also included.
Granted, it has been a while since I was new to tarot so I may have lost a little of my 'very beginner-stance' as far as reading material goes. However, this is a set I'd recommend to pretty much anyone who wanted an understandable guide.
You might want to check the artwork on the deck though to see if its girly enough. It might well not be, but it is very fluent and the colors are lovely even though it has a very diffrent style from the Fey or the Hanson-Roberts.
The Hanson-Roberts actually comes with a book aswell if you get the set.
A very handy pocket-size so it's easy to "camoflage" if she doesn't want to show it off, and takes up very little space. It has a one-page description of each card, which is also depicted on the left side, making it easy to just find the card you want to look up, and no leafing back and forth is needed. Very easy overview and a brief description of the main components of the images.
I have no idea what the Fey companion book is like though.