Honestly, I think that it mostly has to be true because non-fiction is all about the truth. If any part of the story is not true, it would have to be a fiction book because it is not entirely true. Like if I were to write about the time that I was in High School, and I said that I was beat up by bullies all the time but in reality I was never beaten up and I was friends with all the people I said, it would be a completely different story that was not true (i.e. Fiction).
But it doesn’t matter how much of the truth was in the book, because it all comes down to how good the book really was. The truth only really matters to the person, who experienced it, but to give people a book that is good and fun to read is never a bad thing.
I think that it doesn’t matter what we label the books because what does it matter if it is Non-Fiction/Fiction? All that matters is that you picked up the book and liked it. The truth will never always be the same as long as there are people around to change it, so just enjoy all the different versions there is of it.
