Peter-Paul Verbeek, What Things Do: Philosophical Reflections on Technology, Agency and Design - The Pennsylvania State University Press, University Park, Pennsylvania, 2005, Paperback, £16.95, $25.00, ISBN-10: 0271025409, ISBN-13: 978-0271025407, Hardback, £50.95, ISBN-10: 0271025395, ISBN-13: 978-0271025391.