Star Trek IV Sourcebook Update
Role-playing game source book about Star Trek IV.

Summary
From the book jacket
All is not well on Terra…
Admiral Kirk and the crew of the  are en route to Terra to face court martial proceedings for their actions in . The Klingons are demanding custody of Kirk for his part in Genesis while the Genesis controversy rages unabated. And an even more catastrophic danger has materialized to threaten the very existence of Terra.
The Star Trek IV Sourcebook Update contains all the information needed to bring your  campaign up to date. It discusses the opinions of the Klingons, Romulans, and different factions within the Federation regarding Genesis and contains essays about Operation Armageddon, a Star Fleet computer simulation detailing war between the Federation and the Klingon and Romulan Empires. Sections describe what can be done to prevent the unauthorized use of starships and what sort of military justice the Enterprise crew will face when they return to Terra.
The races of the Federation…
Also included is a 16-page color section illustrating some of the new aliens seen in . Along with each illustration is a description of the creatures as well as notes on their civilization and history.

Contents
 Earth Spacedock's security
 The politics of Genesis
 Timeline update
 Federation members

Introduction 
The State of the Federation
The Politics of Genesis 
Planetary Rights
Operation Armageddon
Security Procedures
Star Fleet Military Justice
Timeline
Portraits of Alien Races
Alien Races

Background information 
According to some web sources,  the aliens introduced in Star Trek IV had names assigned by the makeup department production staff; for example, the Efrosians were named for Paramount Pictures's Mel Efros. FASA adapted these canon names for this work.
A follow-up book, the Star Trek V Sourcebook Update, was announced by FASA but never released.

Credits
 Editor-in-chief: L. Ross Babcock III
 Senior Editor: Donna Ippolito
 Layout and typesetting: Tara Gallagher
 Paste-Up: Dana Knutson & Todd F. Marsh

References

Federation members
For each of the fourteen aliens showcased in Star Trek IV Sourcebook Update, a table of game statistics is given, along with some background information, including the indigenous and "Terran" names for the homeworlds. The gallery below gives a visual overview of the aliens referenced.

 The Edoans and Alpha Centaurans were not actually seen in Star Trek IV: The Voyage Home, yet they did appear in the sourcebook.

Role-playing games