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Books about Margolese:
Off The Derech: How To Respond To The Challenge [Paperback]  (Author) Faranak Margolese (2005)
Wiki information Margolese:
David Margolese is an entrepreneur and a founder of Sirius XM Radio, serving as chairman and CEO from 1993 to 2002. Considered “one of the earliest advocates of pay radio,” he “effectively created the industry.”
Faranak Margolese is a writer, best known as the author of Off the Derech, a book about contemporary assimilation in the Orthodox Jewish world.