Her Majesty's Swarm/Light Novel/Volume 4

Her Majesty's Swarm: Volume 4 is the fourth volume of the light novel of Her Majesty's Swarm. It was originally published in Japan on May 6, 2021 by Kodansha. The English translation is set to be published in the United States by J-Novel Club on December 14, 2021

The Fourth War arc and the first 13 chapters of the Fifth War arc of the web novel were adapted for this volume.

Synopsis
'''The Arachnea's queen sets her sights on the Nyrnal Empire, but in order to get there, she must first seize the Eastern Trade Union. As the war intensifies, Grevillea's secrets are dragged out into the light, propelling the story toward its climax!'''

After subjugating three countries, Grevillea sets her sights on her next target: the supreme military power and land of swooping wyverns, the Nyrnal Empire. In order to secure a path into the country, she must first seize the neighboring Eastern Trade Union. The Union's capital city of Khalkha is a paradise where any and all pleasures are within arm's reach—but when Grevillea and Emperor Maximilian vie for supremacy, will its utopian streets run red with blood?

The Arachnea and the Empire, the two remaining great powers on the continent, clash for the right to rule. As Grevillea's secrets are dragged out into the light, the story hurtles toward its climax!