Agatha H. and the Clockwork Princess
Phil Foglio & Kaja Foglio
Girl Genius (Novels) (2)
Agatha H. and the Airship City
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Girl Genius Sourcebook and Roleplaying Game
Jason Andrew & JN Child & Kaja Foglio & Phil Foglio & Victor Foglio & Jason "PK" Levine & Jimmy Reckitt
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Girl Genius#0 - Secret Blueprints
Girl Genius: Nuts and Bolts