Darkness Descending

From Turtledove

Darkness Descending is the second book of the Darkness series. Algarve has been victorious on all fronts and conquered Valmiera, Jelgava, Forthweg, and Sibiu. Now Algarve is at war with Unkerlant and seem to be about to win again. Meanwhile scholars from the island nations of Lagoas and Kuusamo are rushing to discover a new source of magic, one that could change the face of the war.

The Darkness series

Into the Darkness | Darkness Descending | Through the Darkness | Rulers of the Darkness | Jaws of Darkness | Out of the Darkness |