The authors would first of all like to thank their wives for their patience and continuous encouragement during the writing of the book. Their gratitude also goes to Yahya El Mir, Julien Mériaudeau, respectively CEO and chairman of the SQLI Group who sponsored the project.

They thank their colleagues, friends, and customers who were kind enough to read the book and provide their feedback. In an alphabetical order: Thierry Albain, Arnaud Deslandes, Arnaud Damme, Gilles Godart, Olivier Larribe, Charles Le Gallic, David Macchioni, Jean-Luc Raffaelli, J.Patterson Waltz.

Finally, special thanks go to Pascal Pignon, Regional Channel Manager for Southern Europe at Google who has consistently supported this project since the beginning and, in fact, made it possible.