I’d like to thank all the team members at Packt Publishing, who worked with me as an incredibly helpful team; Larissa Pinto, who trusted me to work on this project--we worked together so that the idea came into this book--and Onkar Wani, who was very patient and helpful with time management. I would like to thank my technical reviewer, Rashil Shah; my reviewer Susan Nash; and proofreaders, for their thorough reviews and insightful comments.

The writing process of a book involves a great amount of lonely hours, therefore, I owe tremendous thanks to my wonderful son, Nico, who was very patient and supportive in the writing process of the book. He was on some occasions forced to be alone while I concentrated on my writing. Special thanks to my love Jorge, who was very supportive during the whole writing process.

My parents, Susana and Jose, who always stand by me and support my decisions. My brother, Gastón C. Hillar ,and his wife, Vanesa Olsen, and my nephews, Brandon and Kevin, with whom I spend unforgettable moments.

Last but not least, I would like to thank the Rivera and Dimuro families, with whom I share delicious asados.

I would also like to thank all my students, either virtual or real, who make it possible for me to be a teacher.