1990.
J.K. Rowling was 25 when she began writing Harry Potterand 32 when the first book was released.The first book in the series is called Harry Potter and the Philosopher's Stone. The title was changed to Harry Potter and the Sorcerer's Stone for the US release.
She was 32 when the first book was published.
26
he was 56 wrote his first book
J.K. Rowling wrote her first book "Rabbit" when she was six years old. It was never published and no information, including the length, is known about it.
Charles wrote his last book at the age of 58 years old and wrote his first book at the age of 24 years old.
Mary Shelley was 20 years old when she wrote her first book, "Frankenstein".
6
J.K. Rowling's first published work was Harry Potter and the Philosopher's Stone which she began writing in 1990.She completed her first book when she was six years old. It was called Rabbit.
Isaac Asimov was 21 years old when he wrote his first book, "Marooned off Vesta."
enid blyton was 14 when she wrote her first book "childrens whisper"
John Boyne was 29 years old when he wrote his first book, "The Thief of Time," which was published in 2000.