Hence , in 1943 , Anthony and his wife Elva ( 1913 - 1990 ) began designing a murder mystery board game .
At the time books like And Then There Were None and The Body in the Library were also enormously popular .
In 1943 , Anthony and his wife Elva ( 1913 - 1990 ) began designing a murder mystery board game .
At the time books like And Then There Were None and The Body in the Library were also enormously popular .