The first line "Not for the first time, an argument had broken out over breakfast at number four, Privet Drive" is from the novel "Harry Potter and the Order of the Phoenix" by J.K. Rowling. It is the fifth book in the Harry Potter series, published in 2003. The story follows Harry Potter's fifth year at Hogwarts School of Witchcraft and Wizardry, where he faces challenges, political turmoil, and the rise of Lord Voldemort.