Abstract Award-winning American author, educator, and political activist Kay Boyle (1902-1992) was a prominent member of the American expatriate modernist circle of the 1920s and 1930s. Boyle's later years are characterized by her extensive political activism. The Kay Boyle letters to Helga Einsele document Boyle's decades-long friendship with criminologist and prison reformer Helga Einsele (1910-2005). The collection comprises letters from Boyle and their enclosures, drafts of Einsele's replies,...