This book would not have been possible without contributions from some special people whom we would like to thank from the deepest corners of our heart. First and foremost we would like to thank our friend and colleague Sachin Joshi, who inspired us to proceed with this endeavor and guided us whenever we felt without direction. Thank you, Sachin; we are truly indebted to you.
We also would like to thank the entire Pearson team, especially Betsy Harris, Geneil Breeze, Mark Renfrow, and J. Boyd Nolan. We would also like to thank Neil and Loretta for taking our proposal from a dream into a reality. Thanks to everyone; you all rock!!