15 books in series
Girl Genius
Girl Genius is a 15-book series with 15 released primary works first released in 2001 with contributions by Phil Foglio, Mark McNabb, Kaja Foglio, Brian Snōddy, and Cheyenne Wright.
| #2 |  Agatha Heterodyne and the Airship City
| 3.95 | 24 reads | ||
| #3 |  Agatha Heterodyne and the Monster Engine (Girl Genius, #3)
| 4 | 15 reads | ||
| #4 |  Girl Genius
| 4.08 | 14 reads | ||
| #5 |  Agatha Heterodyne and the Clockwork Princess (Girl Genius, #5)
| 4.08 | 13 reads | ||
| #6 |  Agatha Heterodyne and the Golden Trilobite (Girl Genius, #6)
| 4 | 10 reads | ||
| #7 |  Agatha Heterodyne and the Voice of the Castle (Girl Genius, #7)
| 3.78 | 10 reads | ||
| #8 |  Agatha Heterodyne and the Chapel of Bones (Girl Genius, #8)
| 4.2 | 11 reads | ||
| #9 |  Agatha Heterodyne and the Heirs of the Storm
| 4.2 | 10 reads | ||
| #10 |  Agatha Heterodyne and the Guardian Muse
| 4.14 | 7 reads | ||
| #11 |  Agatha Heterodyne and the Hammerless Bell
| 4.5 | 4 reads | ||
| #12 |  Agatha Heterodyne and the Siege of Mechanicsburg
| 4.33 | 2 reads | ||
| #13 |  Agatha Heterodyne and the Sleeping City
| 3.75 | 3 reads | ||
| #15 |  The City of Lightning
| 4 | 1 read | ||
| #16 |  The Incorruptible Library
| 4.5 | 2 reads | ||
| #19 |  Sparks and Monsters Sparks and Monsters
| 4 | 1 read | ||
| #20 |  The Exorcism Engines The Exorcism Engines
| 4 | 1 read |