Issue #0 is important to the fans because it contains a great deal of information not revealed anywhere else. It's where we get hints about Klaus's origin as a construct and the fate of his family, a brief history of the Long War, as well as interesting factoids about some of the more minor characters such as Bang and Boris.
It is important to note that this issue is not necessarily canon. Much of it was written before changes in the story were made. However, it does not really contradict anything we know, so if an answer can be found in The Secret Blueprints, fans will tend to take that answer as "good enough".
Table of Contents Edit
|Page Title||Pg #|
|Agatha Clay/Agatha Heterodyne||6|
|Adam & Lilith Clay||7|
|Dr. Tarsus Beetle & Transylvania Polygnostic||8|
|Dr. Silas Merlot & Dr. Hugo Glassvitch||9|
|Baron Klaus Wulfenbach||10|
|Boris Vasily Konstantin Andrei Myshkin Dolokhov||12|
|The Castle Wulfenbach Airship||15|
|Moloch & Omar von Zinzer||21|
|The Hopefully Unnecessary Glossary Mimmoth!||22|
|Credits and copyrights||24|