Amazon.com description: Product Description: The newest in a much-lauded series by a world-renowned authority on Jewish law and contemporary life, this volume includes sections on such issues as rabbinic confidentiality, the use of surveillance systems, fax and telephone machines on Shabbos, observance of mitzvos in polar regions, and much more. The author, a distinguished scholar, outlines the issues, brings the opinions of various halachic decisors, and explains the basis of disagreements between them. A must for anyone interested in Jewish law.