Signed first printings of "Empty Mansions" are for sale on AbeBooks. The first printing was quite small, but a bookseller in California has books signed by both authors. See the listing at AbeBooks. (Look down that page under catalogs for "EXCLUSIVE ~ Empty Mansions ~ FIRST PRINTING ~ SIGNED X 2."
About the Book
Explore the world of the reclusive heiress Huguette Clark and her family, from the No. 1 bestselling book "Empty Mansions: The Mysterious Life of Huguette Clark and the Spending of a Great American Fortune."