In their introductory chapter, the editors pose overall orienting questions—What is schizotypy? What is its relationship to schizophrenia? As is perhaps appropriate for the first conference on schizotypal personality disorder, the questions remain unanswered by the end of the book. In the final chapter, the editors revisit and refine these questions. The debate between dimensional and categorical approaches is summarized, and the suggestion is made that both approaches may be correct. That is, some schizotypal traits may be categorical, while other traits may be distributed normally throughout the population. The authors also speculate that schizotypal subjects may be seen as individuals who have the genetic predisposition toward schizophrenia but, because of other advantages, do not develop it. These protective factors would be important to describe.