The central thesis of Schizotypy: Implications for Illness and Health is both challenging and controversial: that the features of psychotic disorders actually lie on a continuum with, and form part of, normal behaviour and experience. The dispositional or 'schizotypal' traits associated with psychotic disorders certainly predispose an individual to mental illness, but they may also lead to positive outcomes such as enhanced creativity or spiritual experience. Discussion of each aspect of this theme is supported by extensive experimental and clinical evidence, questioning the received medical wisdom which treats psychotic illness in the narrow context of neurological disease. The result is an authoritative and provocative overview of an important topic in psychological research and clinical practice.