The Star Trek Guide (production document)
The Star Trek Guide was an internal document created for writers and directors of , sometimes referred to as the "Star Trek Bible". Gene Roddenberry adapted the first edition of this document from his proposal "Star Trek is...". Between the first and second seasons, D.C. Fontana updated and expanded the document, including new material about the characters.

External link
 : note this pdf contains the second edition before the first edition

Production use documents