I want to leave here references to vehicle dynamics books which can be useful for other people who want to know more about vehicle physics, dynamics, suspension, tire model etc.
1) Fundamentals of Vehicle Dynamics by Thomas D. Gillespie
http://www.amazon.com/Fundamentals-Vehicle-Dynamics-Premiere-Series/dp/1560911999
2) Race car Vehicle dynamics by Milliken and Milliken
http://www.amazon.com/Race-Car-Vehicle-Dynamics-Experiments/dp/0768011272
3) Tire and Vehicle Dynamics by Hans Pacejka
http://www.amazon.com/Tire-Vehicle-Dynamics-Third-Edition/dp/0080970168
4) Road Vehicle Dynamics: Fundamentals and Modeling by Georg Rill
Advanced Vehicle Technology by Heinz Heisler
A series of books written by Jornsen Reimpell. Most of them are written in German.
5) Automotive Chassis: Engineering Principles by Jornsen Reimpell
http://www.amazon.com/Automotive-Chassis-Engineering-Jornsen-Reimpell/dp/0750650540
6) Fahrwerktechnik, Radschlupf-Regelsysteme by Jornsen Reimpell