Mia and her umbra go on the offensive to restore light to her moonlit kingdom in this “thrilling” ( Kirkus Reviews ) third and final book in the Umbra Tales middle grade series that’s Keeper of the Lost Cities meets The Golden Compass . Having grown up in the moonlit city of Nubis, Mia McKenna has always found comfort in the darkness. And yet the dark days following her father’s death at the hands of the Reaper King aren’t something she’s prepared to handle. Daniel McKenna was Mia’s rock. He was the whole city’s rock as the leader of the umbra tamers—the highly trained fighters who protect Nubis from atop creatures made of shadows and starlight. Without him, Mia, the tamers, and all of Nubis are lost. There’s little time to grieve when the tamers are facing two enemies: the Reaper King, who has achieved corporeal form, and Queen Katiya, who powers her city with a terrible secret. Mia must channel her emotions into resolve to get revenge on those who have hurt her family, but if she isn’t careful, the darkness swirling inside her might change her—and her powers—forever.