For centuries Reformed Christians have loved the book of Psalms. We have sung them, we have found comfort in them, and especially, we have found much of the Lord Jesus Christ in them! John Calvin called the book of Psalms a complete anatomy of the parts of the soul. The Psalms truly are a "little Bible" as Luther called them- they are full of vibrant, living, and experiential Christianity.
In 1560 a translation of the Bible (complete with Psalms for singing) was completed by some of the world's most foremost Reformed scholars and pastors. This translation, and the notes especially, continue to be loved and cherished by many in the Reformed and Presbyterian tradition. Here is the Geneva Bible's introduction to the book of Psalms. It embodies the way in which the Reformed have viewed this book:
This book of psalms is given to us by the Holy Spirit, to be esteemed as a precious treasure in which all things are contained that bring to true happiness in this present life as well as in the life to come. For the riches of true knowledge and heavenly wisdom, are here set open for us, to take of it most abundantly. If we would know the great and high majesty of God, here we may see the brightness of it shine clearly. If we would seek his incomprehensible wisdom, here is the school of the same profession. If we would comprehend his inestimable bounty, and approach near to it, and fill our hands with that treasure, here we may have a most lively and comfortable taste of it. If we would know where our salvation lies and how to attain to everlasting life, here is Christ our Redeemer, and Mediator most evidently described. The rich man may learn the true use of his riches. The poor man may find full contentment. He who will rejoice will know true joy, and how to keep measure in it. They who are afflicted and oppressed will see what their comfort exists in, and how they should praise God when he sends them deliverance. The wicked and the persecutors of the children of God will see how the hand of God is always against them: and though he permits them to prosper for a while, yet he bridles them, so much so that they cannot touch a hair of ones head unless he permits them, and how in the end their destruction is most miserable. Briefly here we have most present remedies against all temptations and troubles of mind and conscience, so that being well practiced in this, we may be assured against all dangers in this life, live in the true fear and love of God, and at length attain the incorruptible crown of glory, which is laid up for all who love the coming of our Lord Jesus Christ.