This book tells the story of Leonardo Da Vinci's Mona Lisa, based on a pedagogical approach, in order to present information accessibly, even for those who do not have a background in History or History of Art. On the other hand, the book brings well-documented information, based on testimonials of some of the most renowned researchers who have studied the subject. Before addressing the subject of the book, the author presents the stories of the first three portraits painted by Leonardo Da Vinci: the portrait of Ginevra de’ Benci; the portrait known as The lady with an Ermine and the portrait of La Belle Ferronnière, aiming to use these three paintings to observe Leonardo’s evolving creative process in portrait painting (non-religious paintings), before painting his iconic Mona Lisa, which is thoroughly analyzed in many aspects.