The book is based mainly on 'primary' sources rather than secondary sources.
a new 'primary school' [=('US') 'elementary school', ('US') 'grade school']
The 'primary' function of our schools is to educate our young people.
(..) Main control is being re-routed through Engineering. Data, lock out the main computer. I have isolated the main computer with an encryption code. The Borg have cut primary power to all decks except . The Borg won't stay on Deck . You're all right. Come on, wake up. You are all right. Listen to me. (..)1996 Star Trek: First Contact