The Implacable Absence is a post-existential fantasy in which a mushroom man, a talking bug and a doppelganger traverse Faerie, Nirvana, and other planes of existence in search of the Deadly Galerina, an ambiguous deity from the Kingdom of Fungi. The novel is a non-idiomatic improvisational duet because two authors engaged in a genre-defying, spontaneous (improvisational) creative process, rather than a preplanned (compositional) activity. To add intrigue to the process, one author opted not to commit to paper his passages, contributing instead an imaginative silence. Just as in a musical duet in which one participant decides not to perform, the duet becomes equally defined by the notes one musician plays as by the absence of the notes that the other musician does not play. The active musician still responds to the other, albeit now only to the other's silence. To call this half a novel is a misnomer. It is rather a complete novel, written by two authors, one of whom is expressed in silence."