26
26
he was 56 wrote his first book
Katherine Paterson was 43 years old when she wrote "Bridge to Terabithia."
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".
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.
Looking at some of his websites and info it s unknown when he wrote his first book he wrote story's at the age of 12 and at 19 wrote a book (around 19).
She was 9
250
she was 90 when she wrote her lat book "The First Four Years"