Why is the Bible superior to the Holy books of other religions?
Because it contains the revelation of God that was passed down as the scripture that transform the lives of millions of people since the beginning. It possess the versatility the no book has ever achieved, it represents unity and harmony in all people of race, nationality, language and culture can understand. And lastly, it was through centuries by centuries but it still endures for the ultimate author is the God almighty.
1 Peter 1:25
"but the word of the Lord endures forever." And this is the word that was preached to you."
Thank you for that @iona090.