This article analyzes the key characteristics of Olga Tokarczuk's fiction, whose structure appears to embody the epistemological metaphor of a network of fungal threads (mycelium). The article attempts to demonstrate that throughout her fictional world this non-binary principle integrates the whole and the fragment, identity politics and the politics of becoming, life and death, the personal and the impersonal, words and actions. The roots of the approach must be sought in the posthuman(ist) imagination, the influence of which in Tokarczuk's writing can be traced back to the 1990s, rather than her indebtedness to the aesthetic theories of postmodernism.