Kaja Foglio

Agatha H. and the Clockwork Princess

2012

Agatha H and the Voice of the Castle

2014

Agatha H. and the Airship City

2011

Girl Genius Trilogy

2016

Agatha H. and the Airship City: Girl Genius, Book 1 (Unabridged)

2011

Agatha H. and the Clockwork Princess: A Girl Genius Novel, Book 2 (Unabridged)

2012

Agatha H. and the Voice of the Castle: Girl Genius, Book 3 (Unabridged)

2015