Question: Protective coverings used to bind together the pages of a book are sometimes intentionally copied with what type of written work?

Context paragraphs:
Book cover: A book cover is any protective covering used to bind together the pages of a book.  Beyond the familiar distinction between hardcovers and paperbacks, there are further alternatives and additions, such as dust jackets, ring-binding, and older forms such as the nineteenth-century "paper-boards" and the traditional types of hand-binding.  The term "Bookcover" is often used for a book cover image in library management software.  This article is concerned with modern mechanically produced covers.

Mixed inhibition: Mixed inhibition is a type of enzyme inhibition in which the inhibitor may bind to the enzyme whether or not the enzyme has already bound the substrate but has a greater affinity for one state or the other.  It is called "mixed" because it can be seen as a conceptual "mixture" of competitive inhibition, in which the inhibitor can only bind the enzyme if the substrate "has not" already bound, and uncompetitive inhibition, in which the inhibitor can only bind the enzyme if the substrate "has" already bound.  If the ability of the inhibitor to bind the enzyme is "exactly the same" whether or not the enzyme has already bound the substrate, it is known as a non-competitive inhibitor.  Non-competitive inhibition is sometimes thought of as a special case of mixed inhibition.

Homage cover (comics): Homage cover is a comics term that refers to the intentional copying of a cover from an earlier comic book or graphic novel that references the original artist.  Homages often occur when a comic is rebooted to demonstrate continuity with earlier volumes.  A common target of homage is the first edition of a particular comic (see list below).

Zagg: ZAGG Inc (NASDAQ: ZAGG) is a publicly traded company based in South Salt Lake, Utah.  It is best known for its line of protective coverings for consumer electronics and hand-held devices under the brand name InvisibleShield.

Hand-waving: Hand-waving (with various spellings) is a pejorative label for attempting to be seen as effective – in word, reasoning, or deed – while actually doing nothing effective or substantial.  It is most often applied to debate techniques that involve fallacies, misdirection and the glossing over of details.  It is also used academically to indicate unproven claims and skipped steps in proofs (sometimes intentionally, especially in instructional materials), with some specific meanings in particular fields, including literary criticism and speculative fiction, mathematics and logic, and science and engineering.  The term can additionally be used in work situations, when attempts are made to display productivity or assure accountability without actually resulting in them.  The term can also be used as a self-admission of, and suggestion to defer discussion about, an allegedly unimportant weakness in one's own argument's evidence, to forestall an opponent dwelling on it.  In debate competition, certain cases of this form of hand-waving may be explicitly permitted.

Marc A. Meyers: Marc André Meyers is an American materials scientist, engineer and Distinguished Professor at the University of California, San Diego.  Meyers studies and writes about the dynamic behavior of materials, synthesis, processing, impact testing, and characterization of new materials.  He also studies the properties of biological materials, and in particular the protective coverings of animals.  Abalone shells, toucan beaks, the scales of exotic fish, feathers, piranha teeth, rabbit skin, boxfish, turtle and armadillo carapaces, and pangolin scales are some of the biological materials studied by his group.

Riderless horse: A riderless horse (which may be caparisoned in ornamental and protective coverings, having a detailed protocol of their own) is a single horse, without a rider, and with boots reversed in the stirrups, which sometimes accompanies a funeral procession.  The horse follows the caisson carrying the casket.  A riderless horse can also be featured in military parades to symbolize fallen soldiers.  In Australia for example, it is traditional for a riderless horse known as the 'Lone Charger' to lead the annual Anzac Day marches.

Polyvinyl chloride acetate: Polyvinyl chloride acetate (PVCA) is a thermoplastic copolymer of vinyl chloride and vinyl acetate.  It is used in the manufacture of electrical insulation, of protective coverings (including garments), and of credit cards and swipe cards.

Seizing: Seizings are a class of stopping knots used to semi-permanently bind together two ropes, two parts of the same rope, or rope and another object.  Akin to lashings, they use string or small-stuff to produce friction and leverage to immobilize larger ropes.  Seizings are not recommended for heavy loads for critical use as strain reduces the diameter of the main rope and can permit slippage even with proper construction.  According to "The Ashley Book of Knots", "A "seizing" holds several objects together."  The other type of stopping knots are whipping knots.

Mucous sheaths on back of wrist: The mucous sheaths of the tendons on the back of the wrist are protective coverings for tendons in the wrist.  Between the dorsal carpal ligament and the bones six compartments are formed for the passage of tendons, each compartment having a separate mucous sheath.  One is found in each of the following positions:

Supporting paragraphs: Homage cover (comics) Book cover
Answer: comics