She looks almost colt-ish here, but there's still enough to reconize that she's Twilight Sparkle. Her mane seems almost too short, but the general shape is captured very well, and her tail is pretty much as long as it should be due to it always arcing in her show appearances. Love the pose, and the shine you brought out in her hair is beautiful. Also, those are giant books indeed. It seems like one belongs to Celestia, one to Luna and one is about the modern version of the Elements. Makes it look like a depiction of my beloved Twilight Sparkle further down the road of her studies, having mastered what Celestia and Luna had to teach, but still an Element-bearer and a marvellous friend. Now that's what I like to see. Also, she remains a unicorn, which is the only way to go for me. Thus, the picture those books allowed me to paint actually ends up helping the impression of the drawing I get--an interesting feat to accomplish, and a good one, maker! Thank you!