"La Nonna Alferez" is an exciting historical novel by the famous Spanish adventurer Catalina de Erauso. This book tells the story of a young woman who decided to break out of the ordinary fate of women and become a military officer under the pseudonym La Nonna Alferez. Catalina de Erauso successfully manages to hide her true gender and reveal incredible fighting talents, winning military ranks and respect among the soldiers. This book is full of adventures, social conflicts and internal contradictions of the main character. Readers will enjoy the fascinating writing of Catalina de Erauso, which will help them imagine the life of a female military officer in the Middle Ages.