I never got a book either. They had not been published yet when I bought my Trooper. I downloaded the BOOK and saved it on my computer.
IMHO, 1" is too much, should cause tire wear & feel heavy. 1/8" to 1/2" is all that is needed. Tow-in is what makes the steering stable for most people. When you go to neutral, 0" tow-in or tow-out is when it gets twitchy. I run 0" on my race cars and at high speed they wanted to wander when traveling in a straight line. Great for turning. You really have to know what you are doing with no tow-in at high speed, be careful. Turning in is also a junction of Caster.
rocmoc n AZ/Mexico