First of all, I want to thank all my family, friends, and co-workers, all of whom made this book possible. I wish I could name each and every one of you who contributed directly or indirectly to this book.
To my family, Carlos, Yumaira, Jesús Eduardo, and María Angélica. You were a great source of motivation for this book. Also, a special gratitude to my uncle and aunt, José and María; the CD you gave me helped me relax during those endless nights writing the book.
To all my teachers, professors, and classmates from high school and university— I'll never forget those wonderful years of my life and all the moments we shared. Special thanks to Juan Carlos Guzmán, who, since then, has been a great source of support.
Thanks to all ...