For sure it's the most correct book. For example, there are about 365 prophecies of Jesus in the OT, ones that were prophesied hundreds and thousands of years (there are prophecies of Jesus in Genesis) before He was born. How can anyone tell the future hundreds or thousands of years into the future and be correct. Every one of those prophecies about Jesus were fulfilled. No other book has done that. It also has many, many other prophecies. Ones that were fulfilled in the OT hundreds of years before it came into fulfillment and also prophecies about this day and age. No other book has done that. No person can do that. But God can and God is the true author of the Bible. It was written by about 40 men of differing occupations over 1500 years and yet the different books written by men over a millenia from shepherd, to priest, to king, and so forth were led by God/Holy Spirit into what to write and had the same consistent message. No other book has done that.
Also, there were many attempts by many people to destroy the Bible. The Bible is still here.
Also, how did Moses know about Creation? No one was there to document the days of Creation. How did he know? God guided him. How did Job know the Earth suspended over nothing? Everyone else believed elephants or giants held up the Earth. Job was guided by God that the Earth was round-and science proved that thousands of years later. How did Isaiah know the Earth was round? Many people throughout History believed the world was flat. Science proved it about 1000 years later but the Bible said it in the first place, about a millenia before it was proven.
The Bible has all the answers we need for life and godliness. It shows the way to Salvation. It is a comfort in times of trouble, it guides a person on living the best life and gives warning about making the wrong choices. There are also no contradictions. If someone comes across what they think is a contradiction, if they study further, they will find that it really wasn't a contradiction.
Science, History, Prophecies fulfilled, all of life's questions answered, and Archaeology prove the Bible is unique among all the other books (it's really a library of books about God and people). It is readable for those who are simple in mind and for those who are really intelligent.
There is one example of History and Archaeology proving the Bible is correct. The Bible talks about in several places about a people known as Hittites. For many years the Bible was the only Historical document that talked about Hittites. People who disbelieved basically said, "See? This proves the Bible isn't accurate. If there were a people known as Hittites, there would be other pieces of evidence." Those who believed in God and believed the Bible was true, basically said, "Just wait. Something will be discovered later on that proves the Bible was right all along."
Years later, an archaeological finding of clay tablets was discovered. It took many years to translate it, but when it was translated it showed the Hittites really did exist. The Bible said it all along. And that's just one example out of many that prove the Bible is completely accurate about many topics, not just about salvation and life, but also about science, medicine, History, and many other topics.