From Nikki Meiggs at Wicked Awesome Books:
"A brand new paperback boxed set of The Mortal Instruments series (including City of Bones, City of Ashes, and City of Glass) all signed by Cassandra Clare. City of Ashes is also signed by Elka Cloke, whose poem, 'This Bitter Language,' is featured at the beginning of the book.
The set was opened only to get the books signed."
US only, sorry!