John Mark Grayのリリース

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Cover for John Mark Gray · Sheep (Paperback Book) (2022)

Cover for John Mark Gray · Corporate Game Theory: Strategizing, Thinking & Playing the Corporate Game (Paperback Book) (2020)

Corporate Game Theory: Strategiz... (2020)

Cover for John Mark Gray · Rock Star GM (Paperback Book) (2019)

Rock Star GM (2019)