"The Lusiad" is an epic poem that chronicles the historic voyage of Vasco da Gama, who discovered a sea route from Portugal to India in 1497-1498. The narrative is filled with both historical events and fantastical elements, including sea monsters and divine intervention. The story celebrates Portugal's maritime exploration and its heroes, while also reflecting on the human condition and the nature of life, destiny, and the cosmos.

"Unity And Struggle" explores the concept of national liberation and the fight against colonialism in Africa. The book delves into the importance of unity among oppressed peoples and the necessity of armed struggle to achieve true independence. Through a combination of historical analysis and personal experiences, the author emphasizes the need for a comprehensive understanding of the social, economic, and political factors that contribute to the liberation struggle. With a passionate call for solidarity and self-determination, "Unity And Struggle" serves as a powerful manifesto for those seeking freedom from oppression.

The book in question is a philosophical exploration of the problem of evil, prompted by the catastrophic 1755 earthquake that devastated Lisbon. Through a series of poetic verses, the author grapples with the theological and moral questions raised by such natural disasters, challenging the optimistic belief that this is the best of all possible worlds and questioning the justice of a benevolent deity allowing such suffering. The work is a profound meditation on human suffering, divine providence, and the limits of philosophical and religious consolation in the face of overwhelming disaster.

This book is a comprehensive biography of Christopher Columbus, providing an in-depth exploration of his life, voyages, and discoveries. It delves into his navigation skills, his interactions with indigenous people, and his role in the colonization of the New World. The author, a renowned historian, combines historical facts with a narrative style, offering a detailed account of Columbus's expeditions, his struggles, and his achievements, thus painting a vivid picture of this complex and controversial figure in history.