This is NOT a signature edition. It's a paperback called "Remembered Death" by Agatha Christie. The original British Title: "Sparkling Cyanide". From inside the front cover: Your Wife Rosemary Didn't Kill Herself. She Was Murdered! George Barton received this strange anonymous note almost a year after Rosemary's death. It had all started at Rosemary's birthday party. The six guests saw her take a glass of champagne. Suddenly she slumped to the floor-dead. The verdict: suicide by poison. But after the note, people started to remember things: Rosemary's passionate letter to a mysterious lover, "Leopard." Handsome Anthony Browne's threats. The fact that Rosemary's penniless sister stood to inherit all of her fabulous fortune. Then somebody remembered one thing too many. So the killer struck again! From the back cover: It was certainly a strange kind of party to celebrate Rosemary's birthday. Every guest had a motive for her murder....