In chronological order, the collected material in trade paperback (and limited edition hardback) is: SP = Story Pages: These page counts are for the pages devoted to the story. Introductory/copyright pages and pages of extras (bonus material) are not counted. TP = Total Pages: All pages in a volume, including introductory/copyright pages and pages of extras. Extras means that there are additional pages of art or story before or after the main Girl Genius episode contained in the volume.