Via Fleen, Girl Genius, the long-running, multi-award-winning, ridiculously popular webcomic from Phil and Kaja Foglio has made the jump to prose with the novel Agatha H. and the Airship City. If you're a fan of the series (or just want to get in on all the mad scientist action now), the Foglios hope you'll buy the book...tomorrow.

Why? Well, remember Machine of Death? Ryan North, David Malki!, and all their allies rallied folks to buy their prose anthology over the course of just a few days, and they managed to climb to the #1 position on Amazon. Now the book's available in bookstores nationwide. Bulk buying attracts the attention of retailers. So the Foglios have declared January 12th (which happens to be Kaja Foglio's birthday) Girl Genius Day.

If you want to wish Kaja Foglio a happy birthday, what better way than to buy a copy of her book?

[Girl Genius Books]