Harry Potter and the Prisoner of Azkaban

Born in Yate, Gloucestershire, England, J. K. Rowling was working as a researcher and bilingual secretary for Amnesty International when she conceived the idea for the Harry Potter series while on a delayed train from Manchester to London in 1990. The seven-year period that followed saw the death of her mother, birth of her first child, divorce from her first husband and relative poverty until the first novel in the series, Harry Potter and the Philosopher's Stone, was published in 1997. There were six sequels, of which the last, Harry Potter and the Deathly Hallows, was released in 2007. Since then, Rowling has written four books for adult readers: The Casual Vacancy (2012) and—under the pseudonym Robert Galbraith—the crime fiction novels The Cuckoo's Calling (2013), The Silkworm (2014) and Career of Evil (2015).