This just in from Publisher's Weekly:
Stephanie Owens Lurie and Mark McVeigh at Dutton have acquired five books by Newbery Award–winner and The Westing Game author Ellen Raskin in a major six-figure deal negotiated by Alex Glass and John Silbersack at Trident on behalf of the Raskin estate. The books include two new puzzle mystery novels: The Westing Quest, a sequel to The Westing Game, and A Murder for Macaroni and Cheese, a never-before-seen manuscript nearly completed at the author's death in 1984. The deal also includes the reissue of three backlist novels, Figgs & Phantoms, The Mysterious Disappearance of Leon (I Mean Noel) and The Tattooed Potato.
I would love to get my hands on a sequel to the Westing Game. I can't wait!