In the third installment of the Girl Genius novels, Agatha H. and the Voice of the Castle begins as Agatha Heterodyne returns to her ancestral home, the warped

Agatha must find a way into the bizarre mechanical fortress that is her family's castle, before a charismatic imposter takes her place!

Airships! Imposters! Mad science! Agatha Heterodyne is the last heir to the Maddest of Mad Scientist families, and now she's returning to her ancestral home, th

In a time when the Industrial Revolution has become an all-out war, mad science rules the world—with mixed success. In Agatha H and the Siege of Mechanicsburg

The complete Girl Genius Trilogy, containing Agahtha H. and the Airship City, Agatha H. and the Clockwork Princess, & Agatha H. and the Voice of the Castle.