Answer
John Adams, an HBO miniseries, is based on David McCullough's Pulitzer Prize-winning biography of the second U.S. president. The series follows Adams's life from his early years as a lawyer to his presidency and beyond, capturing the challenges and triumphs of his political career and personal life. McCullough's meticulously researched book provides the foundation for the miniseries's accurate portrayal of Adams's character and the historical events that shaped his presidency.