All I can find about Diana Frances Bell is what it says in the back of my puffin. She was born in NewZealand but moved to Australia when she was 7. She started to write The Rebels of Journey's End when she was 12 and finished it just before she turned 14. When it was published she was the youngest author on Puffin's list. Sadly, she doesn't seen to have written anything later in life.

412 - The Rebels of Journey's End - J