This book is dedicated to my son Lorenzo - for your growing passion for algorithms - to my son Leonardo - for your curiosity to explore the world -, and to my daughter Aurora - for your love. A special thought to Elio and Maria, my father and my mother.

All my royalties will go to theschoolfund.org a non-profit organization devoted to helping fund scholarships for high potential students who cannot afford to attend school.

- Antonio Gulli

This book is dedicated to the loving memory of my mother Late Smt Swarnlata Kapoor, who instilled in me the value of education, and motivated me to continue learning despite odds, and my father Mr Anil Mohan Kapoor  for all his love and support.

A part of my royalties will go to smilefoundation.org a non-profit organization based in India working in the welfare projects on education, healthcare, livelihood, and women empowerment in remote villages and slums across different states of India.

- Amita Kapoor