You should try it sometime! It doesn't necessarily have to be a textbook, you could go buy/use an old book. Plus, it's fun to carry around and when you start drawing in it is awesome. But thank you, I love hearing that I've improved.
This one is really neeeeeeaaattt! You got that "distant" look in her eye really well. It's kind of funny, too, because the picture fits with the words in the background, too.
Thank you, though!