"The Last Don" is a novel by Mario Puzo that explores the life of Domenico Clericuzio, a powerful mafia boss. The story delves into his attempts to legitimize his family's business while navigating the dangerous world of organized crime. The narrative intertwines themes of loyalty, betrayal, and the complexities of family ties. Set in the backdrop of the American mafia, the book also highlights the struggles of Domenico's family members, who are caught between their criminal heritage and the desire for a normal life. The novel captures the tension between tradition and change within the mafia world.