Here is my interpretation and how I would correct it:

History makes a mystery.

Yesterday I was engulfed in a book named Historical Records by Sima Qian. It is such a legendary book of China and it is currently regarded as one of the most popular historical book not only for Chinese, but for bookworms (or book-lovers) living all over the world.

Yes. Every page was captivating me more and more. A police officer reading a book next to me suddenly said to me "Oh! I either had read it once! I was really thrilled to know how tremendous the Chinese history is!" -> I didn't correct this because it is a direct quote.
 
I was emphasized with him. -> I interpret this as: I was surprised by him.
I was thinking the exact same way he was every time I'd turned page.

He then added, however. "Yes. It seemed really extraordinary. However, whenever I get reading of other books such as "Story of Romanian," "Nile River and Egypt," I was just pushed into each of their world and there was never my view. The author's view which wrote their own history in their interest always ruled me. In the world of history, there's no losers'."  -> I didn't correct this because it is a direct quote.

I shook my heads to clear my brain, I could now clearly see how important the habit of continually asking question to authors is.

Here is my interpretation and how I would correct it:

History makes a mystery.

Yesterday I was engulfed in a book named Historical Records by Sima Qian. It is such a legendary book of China and it is currently regarded as one of the most popular historical book not only for Chinese, but for bookworms (or book-lovers) living all over the world.

Yes. Every page was captivating me more and more. A police officer reading a book next to me suddenly said to me "Oh! I either had read it once! I was really thrilled to know how tremendous the Chinese history is!" -> I didn't correct this because it is a direct quote.
 
I was emphasized with him. -> I interpret this as: I was surprised by him.
I was thinking the exact same way he was every time I'd turned page.

He then added, however. "Yes. It seemed really extraordinary. However, whenever I get reading of other books such as "Story of Romanian," "Nile River and Egypt," I was just pushed into each of their world and there was never my view. The author's view which wrote their own history in their interest always ruled me. In the world of history, there's no losers'."  -> I didn't correct this because it is a direct quote.

I shook my heads to clear my brain, I could now clearly see how important the habit of continually asking question to authors is.