The eighteenth volume of Girl Genius begins with…
The colors were done by Cheyenne Wright.
The first page of volume five of act two begins here: The Second Journey of Agatha Heterodyne.. While this volume is often referred to as the fifth volume of act two for short, it is officially the fifth book of
This volume has five pages of extras at the beginning of the volume. The first four provide a fairly extensive cast list with capsule descriptions of the characters. The fifth extra page reproduces the "travel stickers" produced as a stretch goal for Queens and Pirates Kickstarter, as well as an extra drawing of an airship by Phil.
Presumably, a cast list has been included in this volume, although one wasn't present in volumes in the First Journey, because books in the Second Journey are supposed to be a good starting point for new readers. The previous volumes (The First Journey of Agatha Heterodyne, books 1–13) did each include a summary of "The Story So Far" and a humorous capsule biography of the professors, which this volume omits.