You keep using that word. I do not think it means what you think it means.
The Strange Death of Alex Raymond is subtitled "a metaphysical history of comics photorealism".
The term "metaphysical" keeps cropping up. Alex Raymond is "the first human being to methodically and purposefully shatter the metaphysical realism barrier", apparently.
In philosophy, metaphysics means questions about what is really, really, real -- as opposed to epistemology, which answers questions about how we know what we know, and ethics, which is about, well, ethics. Sim seems to be using the word to mean something like "underlying reality" -- what Douglas Adams called "the fundamental interconnectedness" of things. Dirk Gently, you will remember, saw the solution to each problem as being detectable in the pattern and web of the whole.
Does one historical person share a name with another historical person? They may have a "metaphysical enactment relationship". Does a character in a comic strip resemble a real person? It can be said to be a "metaphysical comic art portrayal of them."
The back cover blurb talks about "meta-textual resonances". A meta-text is a text which talks about itself; very often a book which knows that it is a book. One of the things which distinguishes human language from mere signalling is that you can use language to talk about language; where you can't -- say -- use road signs to talk about road signs. (I suppose a sign which said Important Sign In Half A Mile might be meta-sign. )
I do wonder if the two words -- metaphysics and metatext -- have become connected or confused in the writer's mind.
I am trying very hard to be a semi-professional writer and have taken the leap of faith of down-sizing my day job.
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My extended Essay on Cerebus the Aardvark is available from Lulu press.