She shall be the best Princess of Books that she can possibly be! Why, she can even have a Printed Palace, a Castle of Codices! After all, "Bookfort 101" was one of her foalhood favorites! After her coronation, she has added "Bookfort 201: Readable Redoubts and Redans", and "Bookfort 301: Building Buttressed Bindings" to her library! She's been busy since then!
This smile. Those closed eyes. That angle of her open wings. That general pose, with its curves twisting their way towards an upward diagonal direction, most evident in how she seems to point with her hoof, as if telling us to follow her and go forth. Love the shading of her wings and her body. And I like the way you made her hair feel, too. It appears soft and retains it normal look. Her coat feels pleasantly soft, too. I really like the way the "first" layer of feathers is positioned in relation to the "second", longer one, it makes for a very good impression. And finally, the background, with its bright blues and cyans and those soft cloud whites and more desaturated blues, feels quite upbeat and lively. Well done!
Now, excuse me, I have to follow my beloved Princess. There're books to read together with her.