Mean Deviation (book)

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Mean Deviation: Four Decades of Progressive Heavy Metal
Mean Deviation book cover.jpg
AuthorJeff Wagner
IllustratorMichel Langevin
Cover artistMichel Langevin
CountryUnited States
SubjectHeavy metal music, progressive rock
PublisherBazillion Points
Publication date
December 2010
Media typePaperback
LC ClassML3534.W25 2010

Mean Deviation: Four Decades of Progressive Heavy Metal is a non-fiction book written by former Metal Maniacs magazine editor Jeff Wagner. The book was illustrated by Voivod drummer Michel "Away" Langevin and has a foreword by Porcupine Tree frontman Steven Wilson.[1] Mean Deviation was published in December 2010 by Bazillion Points under supervision of Ian Christe.[2]


  1. ^ "Voivod, Porcupine Tree members contribute to 'Mean Deviation' book". August 17, 2010. Archived from the original on January 4, 2011. Retrieved January 17, 2012.
  2. ^ Bowar, Chad. "Mean Deviation book review". Retrieved January 17, 2012.

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