This book is an extensive catalog of literary references to women who challenge heteronormativity in some fashion, although it would be misleading and anachronistic to apply the label “lesbian” in most cases. Approximately 20% of the book covers the entirety of literary history up to the late 19th century. Another 20% is speculation on the sexuality of a handful of pre-20th century women, primarily writers. The remainder covers the 20th century, or more broadly the “post-sexology” era.