I highly suggest the XXX Main book for basic help in pointing you in the right direction to solve a problem, but understanding how everything works together will take some time.
Its all about mechanical grip. BTW, just in case you didn't know "mechanical grip" means grip that is derived from the rolling chassis dynamics (weight transfer which is set using things such as weight distribution, spring rate, dampening, camber, caster, etc.), as opposed to grip gained from the tires or aerodynamics.
The Hudy setup book is a good read:
I gained a better understanding reading these two books as well:
1. Engineer to win by Carroll Smith (formula one ideas) - You won't use half the book as it deals with real car parts we don't have in TC (brakes, etc.) & materials, but the second half is great for setup.
2. Chassis Engineering by Herb Adams (NASCAR/TRANSAM ideas) - The entire book is great, including a section on how to design a base setup from scratch and how to design your own chassis.