Best-selling author Jacqueline Wilson has dedicated her new novel to Molly, an avid writer and charity fundraiser who died from cancer aged just eight years old.

Molly Field was being treated at Great Ormond Street hospital when the writer visited her, shortly before her death. Wilson said that Molly was "so sweet and funny... She made a deep impact on me."

Molly was a writer herself, she helped to raise thousands for charity by writing a trilogy titled The Adventures of Ella Rose. She went on writing her novels even when her vision started to be destroyed by a brain tumour. The story sees a girl, Isabella, travelling to different worlds with her unicorn, as they defeat the evil Queen Ursula.

Wilson met Molly only once but said she was so impressed she immediately began to think, 'What can I do to show Molly made a real impression on me?'

She found out that Molly has a six-year-old sister, Isabella. "I realised I'd been writing a book about sisters who quarrelled a lot but loved each other very much. So I asked mum and dad how they'd feel about the dedication.'

The Worst Thing About My Sister, will feature the dedication: "In memory of Molly and her sister Isabella who loved each other dearly."

Molly's mum said: "She was a gorgeous little girl. Jacqueline's one in a million."

The book will be out on 2 February.