The Bible is called the word of God as it tells us that God inspired the 40 + people who wrote it, so that the things they wrote came from God himself (2 Timothy 3:16-17). But for those who are not Christians, they may find that hard to accept. Looking at what the Bible actually says may help.
Prophecies in the Bible
Probably the most convincing evidence that the Bible IS the Word of God is that it prophesies to future events, which seemed impossible or improbable, but actually happened, and some are still to happen. There are 352 prophecies all through the OT which were all fulfilled in the birth, life and death of Jesus (for more information look them up in Google, as it would take too much space here). For the probability that just 8 of these prophecies would be fulfilled in the life of one man is 1 in 10 to the power of 17 (1:10 with 17 zeros after it) If you consider the possibility that 48 of these prophecies could be fulfilled in the life of one person, the probability is 1 in 10 to the power of 157 (1:10 with 157 zeros after it). Therefore for one person to fulfil all 352 prophesies would be impossible if it were not for the fact that the one who controls all things was the one making the prophecies.
The second coming of Jesus
There are still biblical prophecies that remain to be fulfilled. For the Christians the most exciting one is the second coming or return of Jesus to the earth. In Matt 24 and Luke 21, Jesus gives specific signs that will show us that his coming is near – Wars, rumours of wars, famines, plagues, earthquakes, persecution of Christians, fearful events, and signs in the heavens. The book of Revelation is also a book about events before Jesus returns, and then events after his return, and the destruction and end of this world. No other religion can claim to have a book even remotely similar to the Bible, because God inspired the writing of the Bible, it is not just a list of what to do and what not to do, it is not just a history book or collection of stories. The Bible is a book that is absolutely unique in that it claims to have come through inspiration of God, and for those of us who know God, and read his word there is no problem to believing this. It starts even before the world was created, and ends after the world has been destroyed.
It tells us of God’s plan to bring mankind back to a relationship and friendship with him. It is a guide for those who have found this relationship with God, to show them how to live in a way that pleases God. It is an encouragement to those who struggle with problems or persecution. It is food for the soul. It brings hope for the future.