TruthShrieker is presented as a fanzine publication and features news reports and conspiracy theories from the world of Invader Zim. These stories are written from the point of view of Zim's nemesis, Dib, and other fellow "truthshriekers" as they ask questions like “Where is Invader Zim?”, “Ms. Bitters Has Always Existed??”and “Is This Bee Haunted?”.