Who wrote fifth book of old testament poetry?

The fifth book of the Old Testament poetry is Proverbs.

Here's why:

* Old Testament Poetry: The Old Testament includes several books of poetry, including Psalms, Proverbs, Job, Song of Solomon, and Lamentations.

* Order: The traditional order of these poetic books in the Old Testament is Psalms, Proverbs, Job, Song of Solomon, and Lamentations.

While the exact authorship of Proverbs is debated, it is generally attributed to King Solomon. However, scholars believe that it likely reflects contributions from various authors throughout history.