Trinity Seven The Novel: Holy Maiden & Eighth Library is the third volume of the Trinity Seven The Novel series written by Kenji Saitō and illustrated by Nao Akinari. The volume will be released in Japan by Fujimi Shobo on January 9, 2018.
Arata and the Trinity Seven visit a southern island to investigate some ruins, and in their deepest part, they find a mysterious, amnesic girl. Together with the girl, who calls herself Ceres, embraced by Arin and Hijiri, they enjoy a brief holiday, but, the world suddenly stops, and a legendary devil ‘Giant of the Nornir’ appears. To save their friends, trapped in the Library of Dusk that the giant rules over, Arata and Ceres’ decision is to—!?