WINNER OF 2019 NEBULA, LOCUS AND HUGO AWARDS!

One woman. One mission. One chance to save the world.

It's 1952, and the world as we know it is gone. A meteorite has destroyed Washington DC, triggering extinction-level global warming. To save humanity, the world unites to form the International Aerospace Coalition. Its mission: to colonise first the Moon, then Mars.

Elma York, World War Two pilot and mathematician, dreams of becoming an astronaut - but prejudice has kept her grounded. Now nothing - and no man - will stop her from reaching for the stars.

"Kowal masters both science and historical accuracy in this alternate history adventure." - Andy Weir

"In The Calculating Stars, Mary Robinette Kowal imagines an alternate history of spaceflight that reminds me of everything I loved about Hidden Figures." - Cady Coleman, Astronaut

"This is what NASA never had, a heroine with attitude."-The Wall Street Journal