I'm glad it exists. It is Coyote only, majority focus on 11-14, but does mention 15+ a lot which is nice (since I own a '15).
I think it is a great primer for amateur tuners. It feels like a handbook you'd get in a training course. By that I mean, has most of the information, but feels like the gaps that exist could/would easily be filled in during training.
The book could have gone either way, more technical, difficult to read, dry, whatever and too long for anyone to read/understand in its entirety. This book was short, to-the-point and hits the high points.
I'll need to read it again, and probably reference it a bit in the short term to fully benefit from it.
I will say, they mentioned the 6r80 a couple of times. Maybe a page dedicated to it in the whole book -- while I understand why they didn't go into depth tuning it, I wished they had (since I own an auto). There seems to be so little information on tuning them. Maybe they'll be another book dedicated to 6r80's?
Do not regret purchasing it. Would recommend to anyone tuning 11+ cars.