To my father Waldemir Luis Maioli, who always encouraged me to write a book; to two of my favorite designers and friends, Leandro Varanda and Euler Araujo Silveira, who I love to work with; to Jill DaSilva, James Stables, and Marcelo Morais, who are my inspiration in UX; and to Dave Kearny, who introduced me as a UX blogger and who kindly accepted the mission to write the Foreword.

I dedicate this book to all these wonderful people and many others who support, help, inspire, and believe in me.