This was posted on the official Facebook page for the book moments ago:
"HALLOWEEN collectors, I want to hear from you. Do you have screen-used props, costumes, art, or any other rare items relating to the series? Contact me: firstname.lastname@example.org. I look forward to hearing from you.
This seems to be YOUR chance to help contribute to the creation of a book that will hopefully do an underrated series justice. If you have something special you think you can contribute, definitely contact them. I, along with many, are eagerly awaiting the night this book comes home.