Mastodawn

Atonement by Griselda_Gimpel - The Locked Tomb Series | Gideon the Ninth Series - Tamsyn Muir https://archiveofourown.org/works/49491493 via @ao3org

Ianthe Tridentarius and John Gaius deserve each other.

Set after Harrow the Ninth.

An Archive of Our Own, a project of the Organization for Transformative Works