Free on Amazon.com from Nightshade Books:
Agatha H and the Airship City by Phil & Kaja Foglio - Starred PW Review
The Hugo Award-winning Foglios (Girl Genius) present the first three volumes of their popular gaslight fantasy comic in novelized form, maintaining the zany energy, witty repartee, creative characterization, and innovative world-building of the original. Agatha Clay is a university lab assistant in a world filled with madboy scientists, dangerous automata, and not quite human soldiers with silly Germanic accents. She soon finds herself a pawn in political power struggles when her locket is stolen and she is taken hostage on the airship of the powerful Baron Klaus Wulfenbach. While trying to stay alive long enough to discover the truth, she begins to discover her personal history and genius talents of her own...
[Sorry, don't know how to do clean links yet]:
http://www.amazon.com/dp/B004FN1R28/