Proverbs a book on direction and correction, also a bunch of one liners which are full of wisdom.
Ecclesiastics is a book telling us there is a time for everything. Here he also tells us we should have a heart of gratitude for our maker the one who gave us life and learn to honor him and do what He tells us . We should learn how to fear God most of all.
Song of Solomon here we hear a man and a woman complimenting each other on how they feel for each other and how beautiful they are, Like if its a manual for couples, but we know this is a book on how God loves Israel and his people.