Prequel vs. Interquel — What's the Difference?

A prequel is a literary, dramatic or cinematic work whose story precedes that of a previous work, by focusing on events that occur before the original narrative. A prequel is a work that forms part of a backstory to the preceding work.

(narratology) An installment in a series of works set chronologically between two of its predecessors.

A story or film containing events which precede those of an existing work

(narratology) Any middle sequel with an earlier and a later installment. This usage may not be proper.

A literary, dramatic, or cinematic work whose narrative takes place before that of a preexisting work in the same series.

(narratology) In a series of works, an installment that is set chronologically before its predecessor, especially the original narrative or (perhaps improper usage) any narrative work with at least one sequel.