Matthew Henry is quite good. Steven and Rich have posted Henry's topical breakdown from Proverbs before here, which is an excellent resource. And as Lane noted, there are others who have commented and specialized on Proverbs, notably Bridges. I don't know if Robert Blair's commentary on Proverbs is extant, but that's one I would enjoy reading, as well as Michael Cope on Proverbs, if that was available in English. I have Peter Muffet (Tentmaker Publications) and have been enjoying that.

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Andrew Myers
Husband of Jessica, Father of Jackson, Katie and Samuel
Member, Presbyterian Reformed Church of Northern Virginia
Warrenton, VA USA
Editor, The Matthew Poole Project

"Let your Morning Thoughts, and your last Evening Thoughts, be what shall become of you to all Eternity." -- Matthew Poole