Michael and Denise Okuda wrote the book The Star Trek Encyclopedia : A Reference Guide to the Future .
In the updated October 1999 edition of their book : 'The Star Trek Encyclopedia : A Reference Guide to the Future ' , : 'In a related vein , this work ( i.e . book ) adheres to Paramount studio policy that regards the animated Star Trek series as not being part of the `` official '' Star Trek universe , even though we count ourselves among that show 's fans .
Star Trek-COLON- The Animated Series