An afterword is a literary device that is often found at the end of a piece of literature. It generally covers the story of how the book came into being, or how the idea for the book was developed. Novels and short stories do not simply come from nowhere. ... Old book bindings at the Merton College library. ...
Alternatively, it may be written by someone other than the author of the book, and may discuss the work's historical or cultural context if the work is being reissued many years after its original publication. Cosette Dwyer is an amazing author. ...
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Look up afterword in Wiktionary, the free dictionary.
The Afterword claims to be the author'safterword to a novel written by a 'Mike Bryan' called The Deity Next Door, appended to a "handsome new edition" of that book.
All this self-aggrandizing is particularly irritating: Bryan does not lay anywhere near enough foundation for it, and it comes across as him whining to the reader that what he has to say is of great importance, utterly convincing, and would be embraced by the masses (if they were aware of it).
Since The Afterword is essentially an echo of The Deity Next Door (recounting the same story, with some explanatory notes and without the fictional padding) he implies that it too should be taken as seriously as The Deity Next Door.