The Citadel of the Onis

The Author is missing. The only signs she left behind were that she went to the movies with The Artist (they did not) and Gilbert feeling a disturbance (he did). It's up to the Cult of Veneziano to find her, all while trying to make sure the onis are really gone. Can Brittany Davis and The Vet work past their differences for the sake of getting The Author home?