Why are christians not skeptical of the bible's authenticity?

I too have wondered about that, not only were the people who wrote it primative but they were also people and since no one is perfect the book cant be, but yet they belive it is, how do they know that is the word of god since it was written by man who has a tendecy to place their own point of veiw on things and also things get lost in translation how many things were mistranslated and belived to this day? i personally think that the bible is the greatest work of fiction ever created and it has a cult following that no other book has ever came close to.