Polugaevsky Najdorf Books - Chess Forums

Are there any good recent treatments of the Polugaevsky Variation of the Najdorf, espcially from Black's perspective? I can't find any full-length books, but do any other books offer a lengthy treatment of it?

Sicilian Najdorf Polugaevsky Variation Main Ideas and Practice Games

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Chess Games 1.e4 Series - 5 Book - Tim Sawyer PDF, PDF

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Better Chess Training: July 2016