The Bible had hundreds of authors over a period of several millenia. The Old Testament shows many signs of having been edited, with various writings spliced together, even in the same book. There are even places where the same story is told twice, two different versions, one after the other.
The authors of the New Testament are all anonymous, except for a few (not all) of Paul's epistles. None of the Gospels of Matthew, Mark, Luke and John were written by the men they're named after. Revelation is written by a man named John but it's not clear if it's supposed to be the same John as in the Gospel of John.
In fact not a single book was written during Jesus' lifetime, or by anyone who actually met him or knew him.