シドニアの騎士 [Sidonia no Kishi] #1

This first collected volume of Tsutomu Nihei's acclaimed sci-fi manga series introduces the isolated, drifting generation ship Sidonia, where humanity's remnants battle the monstrous Gauna. The story follows Nagate Tanikaze, a young man raised in the ship's depths who becomes a Guardian pilot, thrust into a desperate war for survival.