Forum:Essential Guides - In-Universe

I have a question about some of the Essential Guide books. I know that the New Essential Chronology and Jedi vs. Sith both have some kind of in-universe equivalent (Jedi v Sith, for example, is written by Tionne after the events of Sacrifice. However, are any of the other Essential Guide books also in-universe?  Is there an in-universe Essential Guide to Droids or Essential Guide to Vehicles and Vessels, for instance?Taral, Dark Lord of the Sith 13:16, 29 July 2008 (UTC)