Wednesday 6 April 2016 ABC
It was a novel for young people by an unknown author called J.K. Rowling.
The manuscript had been rejected by 12 other publishers, but Bloomsbury signed the author without hesitation.
What followed was a decade of intense excitement, and extreme security measures around the 7 instalments of the Harry Potter series.
A large part of the thrill of each annual release was the strict embargo surrounding the plot; and there were many audacious attempts to leak the stories ahead of time.
Children and adults adored the books, making Harry Potter the biggest selling non-religious text in the history of the world. More