City of Lightning (Girl Genius: The Second Journey of Agatha Heterodyne, 2) [Foglio, Kaja; Foglio, Phil]

Agatha is the last of the Heterodynes--a notorious family of Mad Scientists that everyone had thought safely wiped out. In this new chapter of her story, we find the ancestral castle of the Heterodynes trapped in a bubble of stopped time, and Agatha on a journey to find a way to reverse the effect and save the people she loves.