A brilliant, engaging and impassioned shout-out for the worryingly (and surprisingly) imperilled cause of science, full of political vignettes which will make the blood of the sensible boil. The conclusions are worrying, to say the least - that politics and the media are rotten with a closed-mindedness and short-sightedness which is at the least ill-informed and careless, and at the worst completely idiotic. Prepare to be angered! That said, I'm writing from the perspective of the already-convinced - but there's certainly enough polemic in here to keep both sides of the fence pondering the big questions of the true value - and objectivity - of scientific knowledge.
It's not strictly a science book, but rather a social science one, raking through how different kinds of knowledge are valued variously in social worlds. If you're interested in how flows of information are evaluated, taken up and become mainstream (or not), Henderson has written a smashing account, and a great contribution to the debate on the production of knowledge. Make your MP / local councillors read it without delay!