Wikipedia page about this book: https://en.wikipedia.org/wiki/Mizora

Release date is 2008-03-04

Produced by Greg Weeks, George P. Snoga, Martin Pettit and
the Online Distributed Proofreading Team at
http://www.pgdp.net

"Mizora: A Prophecy" by Mary E. Bradley Lane is a feminist science fiction novel first serialized in 1880-81. When a young Russian exile escapes into the Arctic, she stumbles upon an extraordinary hidden world: an all-female society thriving beneath the Earth's surface. Over fifteen years, she witnesses their advanced technology, eugenics practices, and complete elimination of men from their civilization. Upon her return, she faces devastating personal losses but carries knowledge of a radically different future for humanity. (This is an automatically generated summary.)

Original publication data not identified