What's up for grabs: A copy of Clockwork Princess signed by Cassie Clare
Who donated the awesome: Tawney Bland
Why that makes it something you must have: This is a great prize because it's signed by the author. And I don't have this book yet, so you might have to outbid me. Tawney is a fave on Twitter too. She's always there with a smile and now with a helping hand, too.