I bet you have read The Lord of the Rings, If you have not, it is an epic high fantasy novel written by English author and scholar J. R. R. Tolkien.
I watched Lord of the rings movie, is so epic and magical
It was a follow or a sequel to  the Book  to The Hobbit written in 1937
Wow, quite a long time. Was it a true life story?
Of course not, it's an epic high fantasy novel :) 
Was it one of the best selling novel?
Yes it was, the story revolves around  the creation of One Ring to rule the other Rings of Power as the ultimate weapon to conquer and rule all of Middle-earth