At the time of his death in 2015, award-winning and bestselling author Sir Terry Pratchett was working on his finest story yet - his own.

The creator of the phenomenally bestselling Discworld series, Terry Pratchett was known and loved around the world for his hugely popular books, his smart satirical humour and the humanity of his campaign work. But that's only part of the picture.

Before his untimely death, Terry was writing a memoir: the story of a boy who aged six was told by his teacher that he would never amount to anything and spent the rest of his life proving him wrong. For Terry lived a life full of astonishing achievements: becoming one of the UK's bestselling and most beloved writers, winning the prestigious Carnegie Medal and being awarded a knighthood.

Now, the book Terry sadly couldn't finish has been written by Rob Wilkins, his former assistant, friend and now head of the Pratchett literary estate. Drawing on his own extensive memories, along with those of the author's family, friends and colleagues, Rob unveils the full picture of Terry's life - from childhood to his astonishing writing career, and how he met and coped with what he called the 'Embuggerance' of Alzheimer's disease.