.

in itself "tricks and devices" is rather redundant, but it seems to be the prevalent choice on google.
I would just do "plot development or any kind of literary devices" to refer to your previous questions.

Or "style"

Seems to fit the context.

A literary element is an element found in whole works of literature.
Literary elements are not "used" by authors; but instead, they exist inherently in forms of literature and are derived by the readers of a work in question. Theme, characterization, conflict, Setting (fiction), protagonist, antagonist, and point of view are among the many literary elements that exist. They can be about the setting, plot, or even the characters. A
http://en.wikipedia.org/wiki/Literary_element

Литературность можно определить как систему принципов жанровой организации словесных текстов в процессе их создания и функционирования.
Следует различать низшие, первичные уровни организации текста - уровни темы, проблемы, предмета повествования, идеи, задачи и назначения и др. - и высший, собственно жанровый уровень - уровень композиционного завершения текста.

Поэтичность (то есть литературность) означает особый тип сообщения, предметом которого служит его собственная форма, а не содержание.

http://slovar.lib.ru/dictionary/literaturnost.htm

What is the literary aspect of the book
http://wiki.answers.com/Q/What_is_the_literary_aspect_of_the...

In your context: "plot and other literary trappings"

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Note added at 14 hrs (2012-02-13 13:05:44 GMT)
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Oops! Didn't mean to rate that as "5" - rather, "4". Because I like some of the other options, too, such as "devices," except "literary trappings" is kind of a standard phrase, and I suppose it's a bit broader. I mean, if one used "devices," one could omit the world "other" which I suggested adding, but литературность does sound broader than "devices."

It could be, seeing that the theme is printmaking/lithography.

E.g.
...lithographic albums offered Redon a new way to present his work. They appealed to the literary tastes of his circle and introduced new layers of complex meaning and ambiguity. (..) He also manipulated the format of albums, using literary titles and mysterious captions, to help promote his work and produce an artistic response to the literary interests of the Symbolists (from "The Lithographic Album").