Books about Heterodyne from Amazon.com

Adventure, Romance, Mad Science! Agatha Heterodyne is the last heir to the Maddest of Mad Scientist families, and now she's returning home to claim the family castle. Unfortunately, it turns out that she's not the only one with that idea in mind. This collection represents an all-new installment of Phil & Kaja Foglio's award-winning gaslamp fantasy series and includes an extra four-page story in addition to the main plotline..
Price: $9.99 [Notify me when price goes down.]

In a time when the Industrial Revolution has become an all-out war, Mad Science rules the World... with mixed success At Transylvania Polygnostic University, Agatha Clay is a student with trouble concentrating and rotten luck. Dedicated to her studies but unable to build anything that actually works, she seems destined for a lackluster career as a minor lab assistant. But when the University is overthrown, a strange "clank" stalks the streets and it begins to look like Agatha might carry a spark of Mad Science after all..
Price: $5.15 [Notify me when price goes down.]

In a time when the Industrial Revolution has become an all-out war, Mad Science rules the World...with mixed success At Transylvania Polygnostic University, Agatha Clay was a student with trouble concentrating and rotten luck. Dedicated to her studies but unable to build anything that actually worked, she seemed destined for a lackluster career as a minor lab assistant. But then the University was overthrown and Agatha was taken aboard the giant airship Castle Wulfenbach - where it begins to look like she might carry a spark of Mad Science after all..
Price: $11.45 [Notify me when price goes down.]

The climax to the second Girl Genius story-arc The Wulfenbachs discover that Agatha is still alive and come to get her. Things are complicated by the fact that Agatha is currently possessed by the evil mastermind responsible for the Long War..
Price: $11.75 [Notify me when price goes down.]

Agatha Heterodyne is the last heir to the Maddest of Mad Scientist families, and on the run from the current ruler of Europe. In a fairy-tale castle on a mountain pass, she finds herself at the center of an evil plan to bring back one of the deadliest enemies of recent history..
Price: $10.23 [Notify me when price goes down.]

The Adventure, Romance & Mad Science continues as Agatha Heterodyne's damaged aircraft comes roughly to rest in the Wastelands She encounters a traveling circus and proves her mettle by destroying a massive spider-clank as it attacks. Back at the airship city, a frustrated Baron Wulfenbach dispatches his son Gilgamesh and deposed pirate queen Bangaldesh DuPree to capture Agatha, whose very existence threatens the peace - but the cunning circus folk succeed in hiding Agatha, who quickly discovers she is only one of their many secrets. She begins warrior training with the circus's expert swordswoman Zeetha, meets a strange new breed of Jagermonster, and attracts unexpected attention in saving them from the grimmest of fates..
Price: $10.69 [Notify me when price goes down.]