a mysterious book brought me into unknown worlds

Niel was just your average guy. his entire life was so average that u won't even remember him even though you have met him for a few times. Until one day where he was inside of a library searching for books to past his time, he saw a lonely book in the corner of the shelves. He somehow felt attracted towards the book. Taking the book out of the shelves, he dusted the dust away from the book, looking closely he saw that the book was black in color and it got gold engravings on it's cover with the words "The Book Of The World". THIS NOVEL WAS INSPIRED BY MANY ANIMES AND NOVELS SUCH AS : complete martial art attributes, and I kill slimes for 300 years AND MANY MORE.