Clearly an early book, with the lack of depth and complexity you would expect, though the characters offer plenty of opportunity for development. 
 Failed Edwardian suffragette Lady Rose Summer and invalided army Captain Harry Cathcart (who don't like each other much) join forces to solve a murder and a disappearance at a country house party. Despite the title, the murder was so long coming I initially thought the book was a romance. 
 It's a nice easy cosy mystery that won't take too much time or brain power to get through, and some days that's all you need.