A few facts for your consideration:
REBUS will be in bookstores on October 1st.
It is available for pre-order now here: http://www.chroniclebooks.com/index/main,book-info/store,books/products_id,9460/
Chronicle Books will hold a special pre-order promotion at San Diego Comic-Con: the first 250 pre-orders made in person at the Chronicle Books booth (#1506) will receive a signed bookplate. The book will be shipped directly to the buyer when it is available in the Chronicle Books warehouse in September. SDCC is the *only* way to get the bookplate. One pre-order person.