Sermons or meditations on Jonah?

Dr Thomas Renz suggested (at the Latimer Trust Ability & Reliability day yesterday) that Jonah doesn’t have a single clear message, or three definitive points for us to take away. Rather, the story of the book of Jonah is designed to get us to reflect in certain ways on particular themes and issues. Obviously this is a “points on a spectrum” type point not an absolute distinction (c.f. the so-called “beard fallacy”), but it still seems a valuable one which ought to affect how we understand and preach the book.