I would like to thank my girlfriend, Angélica, for being so patient and for her support while I was spending almost all of my spare time writing this book. Also, I would like to thank my family, especially my mom and my brother, for always believing in me; it is thanks to them that I am the person I am.

Thanks to Vane (<[email protected]>) for creating all the art for this book and designing those charismatic characters.

Also, thanks to all my friends: the canupis, Javi Sáez, the jiervos, Kike, Pedro, Guille, Carmelo, and more, for all the laughs and the good times we spent together.

Finally, I want to thank the reviewers of this book for making it better and the rest of the people at Packt Publishing for making it real.