Personal Trainer: A four-page interlude starring Agatha and Zeetha; with Krosp on hand for helpful commentary. Some readers may feel that this one contains spoilers, but I can't really see that there's anything really excessive there. I'd say, take a risk. It's just a silly story.
Fan Fiction: written by our esteemed colleague Shaenon Garrity of Narbonic.com. A Mary-Sue tale of Heterodyne Boys Adventures, and yet another example of the kind of thing the Heterodyne Legacy is subjected to. Warning: quite silly.
Girl Genius is written by Professors Phil & Kaja Foglio of TPU, with drawings by Prof. P. Foglio. Volume One was inked by Brian Snoddy. Volumes Two and Three were colored by Mark McNabb. Volume Four was colored by Laurie E. Smith. Cheyenne Wright is our current colorist. His work begins with Volume Five.