Thursday, 30 March 2017
A sequel, e.g., to The War Of The Worlds, assumes that the events of that novel occurred whereas a conceptual sequel is a work in which the characters have read the earlier novel and are able to discuss it and to base some of their actions upon it.
HG Wells' Star Begotten is a conceptual sequel to his The War Of The Worlds;
in SM Stirling's Change series, a group of characters take advantage of the post-technological conditions to base their life-style on Tolkien's fantasies, even referring to the post-Change era as the Fifth Age;
in Poul Anderson's There Will Be Time, one of the mutant time travellers sold the time travel idea to HG Wells;
also, Anderson's mutants, while time travelling, see their environment speeded up, as Wells' Time Traveller did.