Book chapters and the like
Here are some other bits and pieces of mine which I can only list, not link to - aside from directing you to Amazon
Genes, genomes and what to make of them. Chapter in Brigitte Nerlich, Richard Elliott, and Brendon Larson (eds) Communicating Biological Sciences - Ethical and Metaphorical Dimensions. Ashgate, 2009.
Communicating Science in Fiction. Chapter in Open University Course Reader, MSc in Science Communication: Holliman, Thomas, Smidt, Scanlon, Whitelegg (eds), Practising Science Communication in the Information Age. Oxford University Press, 2008.
Popular Science Books. Chapter in Massimiano Bucchi and Brian Trench, Handbook of Science Communication, Routledge 2008. (doesn't look different from the next one, but it is!)
The Latest Boom in Popular Science Books, chapter in Martin Bauer and Massimiano Bucchi (eds), Journalism, Science and Society - Science Communication between News and Public Relations Routledge, 2007.
Sick at Heart: Appetite Versus Technology in the Twenty-First Century, in James Peto (ed) The Heart. Wellcome Trust/Yale University Press, 2007. A rather handsome volume published to accompany the first exhibiton in the Wellcome Trust's lavish new public space in London. This volume won the BMA popular medical book award, so I assume the judges thought this closing chapter was up to scratch.

Passing it on: redescribing scientific explanation. Chapter in John Cornwell (ed), Explanations: styles of explanation in science. Oxford: Oxford University Press, 2004. A collection of essays, mostly by people who actually know science stuff, of which Chris Nunn wrote in The Journal of Consciousness Studies, "anyone wanting to write about science should read the final essay, Jon Turney’s description of how it can be done".
In Proceedings of Crossing Over: Genomics in the Public Arena. University of Calgary Press, 2005. There's a lecture based on this which I still give from time to time, on request...
Genetic Screening. Chapter for Ralph Levinson and Michael Reiss (eds), Understanding Bioethics: Decoding the Problems. (Routledge/Falmer, 2003)
Dolly and Deja Vu: Facts and Fictions about Human Cloning. Chapter in Etica della ricerca biologica, Papers presented at The European University Institute Florence Conference, November 1999. Olschki Publishers, 2000
Reprinted in: Cosimo Marco Mazzoni (ed) Ethics and Law in Biological Research, Kluwer, 2002.
The Word and the World – engaging with science in print
in Communicating Science – contexts and channels (Ed. Eileen Scanlon, Elizabeth Whitelegg and Simeon Yates), Open University/Routledge, 1999, pp120-133.
The recombinant DNA debate
in Communicating science: professional contexts Scanlon, E., Hill, R. and Junker, K. (eds), Open University/Routledge, 1999, pp289-303.