The Book Of Psalms

Psalm is mostly composed by King David. Psalm is a very real and practical book. It highlighted all the strong feelings and weakness about a person. It is  easily identified by people who have the same sentiment about life, about troubles they are going through, about their trust in the Lord to deliver them, about their praise and thanksgiving to God and so on.

They are written like a testimony, Claiming promises, declaring God's goodness and greatness

https://simplelessonsfromthebible.blogspot.com/2018/08/33-life-lessons-and-commentary-from-book-psalms-bible-study.html

Psalm 120 - 134, 15 books of David's song of accent
The Stairs of the Temple Songs. The Step Songs
We shall consider them as songs sung by those pilgrims who went up to Jerusalem to worship

Psalm 120 - 7 verse
David - A song of accent
Complaint about his own lying and deceitful tongue, a tongue that lead to war instead of peace

Psalm 121 - 8 verses
David - A song of accent
Declaring God's help and God's protection

Psalm 122 - 9 verses
David - A song of accent
Talk about Jerusalem (probably where the city of David), a place where the house of God is, where Israel will go and worship God,

Psalm 123 - 4 verses
David - A song of accent
Look to God for His hands of mercy because of the proud and arrogant oppression

Psalm 124 - 8 verses
David - A song of accent
Testifying of God is on our side to protect us from any form of nature attack and such help is in the name of the Lord.

Psalm 125 - 5 verses
David - A song of accent
Trust that is like mount Zion, cannot be shaken. A plead to God to do good to those who are good and banish those who do evil.

Psalm 126 - 6 verses
David - A song of accent
Restoration of fortunes like a dream, as a testimony of God's glory in us for others to see

Psalm 127 - 5 verses
David - A song of accent
Unless the Lord builds the house, the builders labor in vain. God must be in whatever we do, if not, we are wasting our time and labor in vain.

Psalm 128 - 6 verses
David - A song of accent
Blessing for those who fear the Lord and walk in obedience with fruitfulness and prsperity

Psalm 129 - 8 verses
David - A song of accent
Oppressed by the wicked since youth, but God has set free from the wicked oppression

Psalm 130 - 8 verses
David - A song of accent
Wait for the Lord or hope in the Lord for all His promises come true during time of trouble