Conversation so far:
how did we get chapters and verses in the bible
When the books of the Bible were originally written, there were no such things as chapters or verses. The divisions were added to the Bible for the sake of convenience.
when did the chapter divisions in the bible originate
The divisions of individual books of biblical scripture into smaller sections began as early as the fourth century A.D. Codex Vaticanus, a fourth century Greek manuscript, used paragraph divisions.

Question: who wrote the book
Self-contained rewrite: who wrote the bible