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The Ultimate Diesel Guide is a booklet about the diesels on the Island of Sodor.



  • The book was given away at Day Out with Thomas events and with DVDs in the UK and US. It was also available online.
  • For unknown reasons, Class 40, Splatter and Dodge were not included.
  • This book reveals Dennis and Norman are twins.


  • On the front cover, Salty's bufferbeam is not weathered.
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