Bible. Proverbs
Free to read here, from Project Gutenberg.
The Bible, King James version, Book 20: Proverbs
The Preacher's Complete Homiletic Commentary on the Books of the Bible, Volume 13 (of 32)
The Expositor's Bible: The Book of Proverbs
The World English Bible (WEB): Proverbs
The Sceptics of the Old Testament: Job - Koheleth - Agur
Precepts in Practice; or, Stories Illustrating the Proverbs