The previous Girl Genius omnibus was in black and white and was only available as an 8 by 6 inch paperback. The new hardcover omnibus is in full color and is considerably larger, at 10.3 x 6.7 inches. The color omnibus is broken up into three sections that correspond to the three volumes that make it up: * Agatha Heterodyne and the Beetleburg Clank * Agatha Heterodyne and the Airship City * Agatha Heterodyne and the Monster Engine