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.
(..) We found a solution, Connor, that can end this war once and for all. We know the machines use shortwave transmitters to communicate. Our Intel has located a hidden signal under the primary channel. It allows for direct control of the machines. Skynet's a machine, and like all machines... (..)2009 Terminator Salvation