Kaja Foglio è un'artista e autrice di fumetti, nota per aver scritto la serie *Girl Genius*, vincitrice del premio Hugo, insieme a suo marito Phil Foglio. Il suo distintivo stile artistico ha inoltre impreziosito le illustrazioni per il popolare gioco di carte *Magic: The Gathering* e le copertine di numerosi romanzi fantasy. Foglio è celebrata per il suo unico tocco visivo, che porta vividamente in vita i mondi delle sue storie per i lettori.
After escaping from the massive airship known as Castle Wulfenbach, Agatha falls in with a travelling troupe of performers, where she begins training under Zeetha, swordmistress and princess of the lost city of Skifander. With Wulfenbach on her trail, it's going to take more than a spark of Mad Science for Agatha to traverse the treacherous wasteland of war-torn Europa.
Agatha Heterodyne returns to her ancestral home, the warped little town of Mechanicsburg, to convince the artificial intelligence that animates her family's castle that she is, in fact, the new Heterodyne. But things get complicated when an imposter claiming to be the legitimate heir appears.
The Industrial Revolution has escalated into all-out warfare and Europe is ruled by dynasties of mad scientists, terrorizing the population with their bizarre inventions. At Transylvania Polygnostic University, student Agatha Clay seems destined for a boring career as a lab assistant, until the University is overthrown by a ruthless tyrant, and Agatha finds herself a prisoner aboard his massive airship