The Plot: The Secret History of the Protocols of the Elders of Zion by Will Eisner
This graphic novel was the final work of master cartoonist Will Eisner. Throughout his career he developed most of the important narrative skills of the medium. Over the years he was one of the first to take the medium seriously as a place to tell stories and express ideas.
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Anything by Will Eisner gets a sanction from me. This certainly won't go down as Eisner's most entertaining work but his objective here was not to entertain; rather it was to inform, which he does very well, indeed.