This collection of essays edited by Ben Quash and Michael Ward is written by people outside my usual circle of writers. I saw the book footnoted in an article by Kevin DeYoung and thought I might check it out. The twelve pieces deal with well known heresies such as Arianism, Docetism, Nestorianism, etc but include less well known ones such as Theopaschitism and the heresy of the Free Spirit. It is all done with care and a little humour and is refreshing. Originally given as "sermons" the book came out in 2007.
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.