I only like fiction books, why should I read a non-fiction book?\nOptions:\n- knowledge\n- been printed new\n- many words\n- for fun\n- cover
Let’s work this out in a step by step way to be sure we have the right answer.
knowledge
Books are read for various reasons.

Knowledge is one of the reasons to read any book.

Knowledge gives an understanding of various aspects.

Non-fiction book is a kind of book.

.

So, the final answer is knowledge