This volume of Progress in Heterocyclic Chemistry (PHC) is the fourteenth annual review of the literature, covering the work published on important heterocyclic ring systems during 2001. In this volume there are two specialized reviews. The first, by Jan Bergman and Tomasz Janosik, covers their work on sulfur-containing indoles. The second, by David Knight, discusses 5-endo-trig iodocyclisations. The subsequent chapters, arranged by increasing heterocycle ring size, review recent advances in the field of heterocyclic chemistry with emphasis on synthesis and reactions.