Dating the book of job
In Old Testament times, authors sometimes referred to themselves in the third person, so Job’s authorship is a strong possibility. This wealthy landowner and father is one of the best-known biblical heroes.
But we know little more than that he was stripped of everything, without warning, and that his faith was severely tested.
Commentary: While the canon of scripture is indeed inspired, the placement of the books is not.
The order of the Hebrew Bible, for example, is somewhat different from the order you are no doubt familiar with (e.g., 1&2 Chronicles are the very last books, with Daniel placed along with Ezra and Nehemiah just before them). Still, the first five books ("of Moses") are universally first in the OT just like the gospels are in the NT, with the book of Revelation universally last.
Several suggestions have been put forth as plausible authors: Job himself, who could have best recalled his own words; Elihu, the fourth friend who spoke toward the end of the story; various biblical writers and leaders; or many editors who compiled the material over the years.
While there is no definitive answer, it was most likely an eyewitness who recorded the detailed and lengthy conversations found in the book.
According to Job , Job lived an additional 140 years after his tragedies occurred, perhaps to around 210 years total.
Here are a few salient things that we do know more or less for certain: the Pentateuch was written first (by Moses, ca. C., I would say), and Revelation was written last (by John, ca. D., I would say; see the link), so that our English Bible order of the very first and last parts of the Bible is indeed chronological.