In his book ‘Microtrends’ Mark J. Penn identifies 75 consumer groups which are growing in importance for marketers. I seem to belong to several of them: Wordy Women (gotta admit to this), Southpaws Unbound (militant lefthanders), Powerful Petites (women tired of buying their clothes in children’s boutiques) but most of all, I am an Extreme Commuter.

Driving from St Kilda to Lilydale every day I have tried most of the time-passing activities Penn discusses. I have decimated the audiobook collections of every library in the south-eastern suburbs and can claim to have read all sorts of weighty tomes I would never have struggled through if I’d had to read them myself instead of having a professional actor read them to me. Being stuck in the middle of the Glen Iris level crossing while some fruity-voiced actor reads Proust to you is a unique experience.

Language tapes are another option. Penn claims you can learn Spanish in 16 hours and get a job as a UN translator. I haven't achieved those dizzy heights but, on and off for 10 years I have practiced my parley vous and can now place an order at a restaurant or book a hotel in Paris while simultaneously negotiating my way around the number 6 tram at the corner of high Street and Glenferrie Road.

Penn is right about the marketing opportunities. Extreme Commuters are a captive audience eager for anything to make the drive more pleasant. Libraries should be targeting us. Just be careful with the relaxation tapes - ZZZZZ.