"
If possible, you should:

1) Read the books
2) Then play W1
3) Then play W2
"
-quote
From another topic 1 guy wrote this.

My question is these "witcher books" are they the file included in the "the witcher enhanced edition" you can buy on gog? (
I saw a file "the witcher story" was included and wondered if that was it??

Gonna buy it later just nice to know in advance (if it is i can dl the book thing on my laptop and read in advance :)

There is a short story titled "The Witcher", is included as a bonus material, and its give some background to one of the main plot of the first game.

There is a short story that, if I remember correctly, was collected in the first Witcher book (which was a collection of short stories). Trying to go through the entire series first can be a bit of a pain, since I am not entirely sure that all of them have been translated, and the ones that have been criticized by some for their translations. That said, I read the first book, and it didn't blatantly come across as poorly translated, and it provides far more background than you need.

No, it's not necessary to read it to understand the game.