Some fu kin nutter. It might have been that chinese bloke " some c u nt " ?
A hebrew kindergarten teacher... or Satan, who knows.
The first version was a mixture of adaptations from other religions' tales of creation, exodus, commendments, virgin conception and virgin birth and messiah stories. Ever since those early versions it is being written and rewritten continuously. It is called translation, clarification and modernization. The wikipedia page on "Bible translations" gives you a good starting point into the rich history of the ever changing content of that book.
Which Bible...there are many significant variations of the them
It was meant to be God's autobiography. It just got terribly misworded.
Man -- Who was the God they talked about I wonder?
A very creative group of writers
Several different people.