Originally written in 1936 by two young Cambridge Fellows, A Guide to the Classics is a light-hearted manual on how to pick the Derby winner. However, as the tongue-in-cheek title suggested, there is more to the book than meets the eye, especially as one of the young dons went on to become, according to his 1990 Telegraph obituary, 'the greatest political philosopher in the Anglo-Saxon tradition since Mill - or even Burke'.

The book takes the abstraction out of the Derby by attacking the systems which had been developed by generations of 'form' experts. It exposes...