"Reigna Without a Kingdom (Historical Study of the 15th Century)" is written by Alberto Pimentel. This book deeply explores the events and personalities of the 15th century, revealing the lives and inner world of women of that time. The author describes in detail the role of women in society, their rights and limitations, as well as their contribution to the development of culture, art and politics. "Reinha without a kingdom" is a fascinating journey into the past that helps to understand and appreciate the value and importance of women's contribution in shaping society and history.