Brian Michael Jenkins, who for more than thirty years has been advising the military, government, and prestigious think tanks on the dangers of nuclear proliferation, goes beyond what the experts know about terrorists efforts to acquire nuclear weapons, nuclear black markets, suitcase bombs, and mysterious substances like red mercury to examine how terrorists themselves think about such weapons.
Prometheus Books, $26.95, September 2008, ISBN#: 1591026563

excellent web page with very impressive list of reviewers – I also especially liked the podcast of Brian discussing the potential of nuclear terrorism.