|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||yesterday||29||$15.73||You save $13.27|
|Amazon US||today||21.36||$15.73||You save $5.63|
John Heaton is a psychotherapist and was a colleague of RD Laing. He studied natural and moral sciences at Trinity College, Cambridge, attending lectures by Bertrand Russell. Judy Groves is a painter, illustrator and designer who has worked on numerous Graphic Guides including Chomsky, Philosophy and Plato.