Religious Answer - By the Disciples and many other who "Jesus and God" talked to. Historic Answer - The bible we read today was actually edited by the British kings to take away rights from the Priests and what not.
The bible was wrote many years ago by different people. But these days people only translate the bible and put it in there own words. But no one of this time has contributed to the bible as in. they was alive back when jesus was. And added or was worthy enough go contribute to the biblr
the Bible is Jehovah God's written word to humankind. he used some 40 human secretaries over a period of 16 centurys to record it but God Himself actively directed the writing by His Spirit. so it is inspired by God (2Ti 3:16). jw.org
The bible is a word that mean library. So there are 50 books. There are only 38 authors of the books, there are 4 unknown authors. Plus if you want to know more, the complete Bible has more than 50 books so there are at least 41 authors.
THE ONE & ONLY "DIVINE LIBRARY", as coined by the Roman Historian Jerome presents powerful insight:
*** si p. 299 Study Number 4—The Bible and Its Canon *** THE DIVINE LIBRARY 4 What man knows today as the Bible is in fact a collection of ancient divinely inspired documents. These were composed and compiled in written form over a period of 16 centuries. All together this collection of documents forms what Jerome well described in Latin as the Bibliotheca Divina, or the Divine Library. This library has a catalog, or official listing of publications, which is limited to those books pertaining to the scope and specialization of that library. All unauthorized books are excluded. Jehovah God is the Great Librarian who sets the standard that determines which writings should be included. So the Bible has a fixed catalog that contains 66 books, all products of God’s guiding holy spirit.