A book brought me to a medieval fantasy world ?

In this fantasy world you can be whatever you want weather that’s a hero or a villain or a merchant, what’s important is that you understand that this world isn’t one where common logic works, you were brought here for unknown reasons , all you wanted to do was read a book you found and the moment you ran through it you were brought to a fantasy like world. So now it’s up to your free will to do what you wish, good luck and try not to get robbed by a goblin