The 1920s, frequently referred to as the ‘Roaring Twenties’ or the ‘Jazz Age’, are often associated with opulent lifestyles and the emergence of striking fashion and furniture trends. Themes in the history of women in crime and thriller fiction show, however, that this decade was also a difficult period in the West, one of widespread financial hardship and of living in the shadow of social turmoil: anti-Semitism, conspiracy theories and fear of the foreign dominated the mainstream press as well as popular fiction. It was also a period in which women were working to navigate their way through a society changed forever by the experience of war. This paper examines some of the well-known detective and thriller fiction writers of the 1920s – Agatha Christie, Dorothy L. Sayers, John Buchan and William Le Queux – and shows how their characters chart the sexualisation of women as well as women’s resistance to the prevailing views of the day. Fictional women of this period represent ‘Everywoman’: independent and intelligent and, most importantly, sleuths and spies in their own right.