This is the best of the four books I chose to look into this topic, easily the most comprehensive and balanced, with a strong ethical component; it shows how the competition for money, rather than scientific progress, is diverting scarce resources and frustrating needed advances.
It does not, however, provide a complete picture. Three other books are helpful:
The Republican War on Science by Chris Mooney is the book that is the most compelling on the perversions of the extremist Republicans (I am a moderate Republican). Read this first or last, depending on your disposition.
Frontiers of Illusion: Science, Technology, and the Politics of Progress by Daniel Sarewitz, is an excellent counterpart to Greenberg as well as the other two books If science is corrupt on the one hand, it is also over-sold on the other, a point that Sarewitz addresses very methodically.
Finally, Investing in Innovation: Creating a Research and Innovation Policy That Works, edited by Lewis Bramscomb and James Keller, brings together a range of views crossing the environment within which scientific research takes place, evaluationg specific programs and policy tools, and making recommendations (all of which have been ignored by the current Bush Administration).
I take three bottom lines from these four books together:
1) We are spending too much on military science & research.
2) Neither Congress nor the Executive have a serious strategy for prioritizing problems, finding private sector partners, and providing seed money for innovative solutions.
3) Both Congress and the Executive, as well as the public and the media, are incredibly ignorant about what science can and cannot do, and where all the money is going to generally poor effect.
4) This is all so important that Science, like Intelligence, needs its own Supreme Court. I am persuaded we need a new form of hybid public agency that is fully independent of the Executive, receiving a percentage of the total disposable budget (say 3%) and hence not subject to Congression pressures.
If you buy only one book, buy this one--but you will be missing important alternative thoughts from the other three.