This topic has actually been talked about quite a bit on this forum before. I am convinced that John Piper's "Christian Hedonism" is a distortion of the Westminster Shorter Catechism.
However someone asked me to read an article on the subject and I want to make sure I understand it properly, so I can give a fair critique of it. Especially concerning where it states that Piper's understanding of the catechism is not unique to him. Supposedly 40 other Puritans pastors such as John Owen, Thomas Manton, Thomas Brooks and Thomas Watson believed the same way as Piper.
http://bobgonzal.es/index.php/2018/05/20/puritan-hedonism-he-who-would-be-holy-must-be-happy/

I suspect somehow the author of the article has either manipulated what these pastors believed; or reads too much into what they were saying.
Any help you can provide would be appreciated.

Thanks

Tom