"The book has an interesting structure. Formal chapters are interspersed with opinion pieces from academics and scientists, many of whom have worked on state bioweapons and biodefence programmes, and in drafting non-proliferation policy. Their thoughts provide unique personal perspectives on issues usually discussed from an academic distance and are the most valuable contribution the book makes to the bioweapons literature." The RUSI Journal Biological Threats in the 21st Century offers a fresh understanding of contemporary biological threats to national security. Readers are introduced to the politics, people, science and historical roots of contemporary biological threats through up-to-date, rigorous and accessible chapters written by leading academics and supplemented by expert point-of-view contributions and interviews. The book provides inspiration and resources for students and researchers, as well as policy makers in government, the public policy sector and the wider community. It is particularly pertinent for those interested in biological disarmament, non-proliferation, counterterrorism and health security.