I have looked at this because the legitimacy of the bible we know now has also preyed on my mind. I have studied it and believe we have enough old writings now to know that it is indeed legit, and the meaning of the bible has not been changed. One must be careful of "versions" a version means it has been changed. One must look for a translation. And preferably one that is translated into the modern language you speak. Nuance is lost when you try to read in a language not your natural tongue.
I could give much evidence that the bible is a legit book. But nobody wants to hear it. And it would be long as hell for me to type out. But i would if asked.