This chapter examines forms of self-writing (memoir, autobiography, diaries, documentary prose, and other in-between genres) that demonstrate an ‘orientation toward authenticity’, to borrow the phrase of the writer-scholar Lidiia Ginzburg. The arc spans the late seventeenth century to the present, with a focus on the period from the end of World War II to the late Soviet era, which witnessed an explosion of non-fictional narratives to document the war, camps, and Stalinist terror. The chapter takes its cues from Ginzburg’s theory that in-between prose is uniquely innovative when it fixes its attention on concepts of the self and literary forms, and that it flourishes most when canonical genres are in flux. In addition to the topic of childhood and, more centrally, personal encounters with history, the chapter discusses the role of women writers, and the sub-genre of the memoirs of contemporaries written by members of the intelligentsia.