A couple of people in this group have talked about Mary Robinette Kowal’s The Calculating Stars.
The book won the 2019 Nebula Award for Best Novel, the 2019 Locus Award for Best Science Fiction Novel, the 2019 Hugo Award for Best Novel, and the 2019 Sidewise Award for Alternate History.
If you saw Hidden Figures — the movie about African-American women who worked for NASA in the 1950s, this is kind of like that, except the women get to go to space, too.
Tor has just made a free copy of the book available for download in Mobi and ePub formats:
The free offer ends June 26.