Two dozen substantial papers from a workshop in Petten, the Netherlands, September 1991, present a snapshot of the use of boron neutron capture therapy for the treatment of cancer, at the moment when the results of the first clinical trials on humans were just available, and several countries were considering approval of further trials. They report on research at a number of institutions; consider safety and efficacy aspects; and describe research methodologies and approaches, findings from animal studies, and the design of carrier compounds. Annotation copyright Book News, Inc. Portland, Or.