The Girl Genius Trilogy

From Author Wars - https://authorwars.com/publications/the-girl-genius-trilogy-606839.html

Overview:

Title: The Girl Genius Trilogy
Author: Phil Foglio
Year: 2016
ISBN-10: 9781597806060
Publisher: Night Shade Books
Price: $31.99
Binding: ebook
Type: Omnibus
Title Reference: Agatha H and the Airship City
Notes: Data from Amazon.com as of 2017-02-24.