Banner of Truth have just published a newly cast biogrpahy of Lloyd-Jones. Called The Life of Martyn Lloyd-Jones 1899 –1981 (ISBN: 978-1-84871-180-8) it is an illustrated paperback of 496 pages (£11/$20) and is a re-cast, condensed and, in parts re-written version of Iain Murray's excellent two volumes D. Martyn Lloyd-Jones: The First Forty Years (1982) and The Fight of Faith (1990). It apparently takes into account the comments and assessments of Lloyd-Jones that have appeared in various places since the previous publications. Its main purpose is to put Dr Lloyd-Jones’ life before another generation in more accessible form.
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.