LilElphaba- When I saw Wicked over the summer, my sister gave Idina a letter. Idina thanked her nicely. It is obvious she is extremely shy, but she was appreciative and signed for everyone. She wasn't very talkative, though. I know a book is different than a letter, but if you just give it to her nicely, without screaming her name and shoving it into her face, I'm sure she will appreciate it. She may not gush over it, but don't take that as her being mean.
"Blow out the candles, Robert, and make a wish. Want something. Want something."
Wishes come true, not free.