"The Book of Fathers" chronicles the lives of twelve generations of men from a Hungarian family, spanning over 300 years from the 18th century to the modern day. Each chapter focuses on one descendant, capturing the historical and personal challenges they face, from the rise and fall of empires to the intimate struggles of love and loss. The novel weaves a tapestry of Hungarian history and the family's legacy, marked by a mystical diary that is passed down from father to son, which possesses the power to influence the fate of its keeper. Through the generations, the book becomes a symbol of the family's heritage and the enduring connection between the past and the future.

The book is an epic poem that blends history, myth, and chivalric romance, recounting the adventures of its eponymous hero, Orlando, a knight of Charlemagne's court. Set against the backdrop of the war between Charlemagne's Christian paladins and the Saracen army that has invaded Europe, the narrative weaves a complex tapestry of love, valor, and enchantment. The protagonist, driven by his unrequited love for the beautiful Angelica, faces numerous trials and battles, encountering wizards, mythical creatures, and various magical artifacts. The poem is notable for its rich interplay of fantasy and reality, as well as its influence on later literature, particularly in the development of the Renaissance chivalric epic.