damien broderick builds on this concept, separating brooke-rose's criticism of tolkien and the specific exposition in tolkien's work, from the megatext concept itself and introducing other comparable science fiction theories, such as the work of gary k. wolfe in "the known and the unknown: the iconography of science fiction" (1979). the "mega-text" in broderick's description is much more clearly identified as a shared cultural experience and interaction between writer and reader.