This is a question that I was asked by a friend who is not completely on board with EP, but I don't have an answer and am curious myself. So this may be more for those who have a conviction of the EP position, but wouldn't mind hearing from anyone who might have valid input. So my question is, when in the history of the church did the singing of Psalms stop being common? if EP is biblical, when did the church cease EP and how did it go largely unchallenged? If there is a book I could read, or a place I could go to learn more that would also be very helpful. Thank you all very much!