In the wake of the bloody coup of 1 October 1965, three young Indonesia scholars, Ruth McVey, Fred Bunnell, and Ben Anderson, all working with George Kahin at Cornell University, set out to explain how things had gone so wrong. They began their analysis with a careful examination of the patterns of promotion and transfer in the Indonesian military, which seemed to indicate that tensions between Javanese and other officers played a major part in the coup. Keen to make this information available to other scholars, they quickly wrote up a draft version of their findings and tentative conclusions, and circulated it to a few friends and colleagues. This fateful decision, ironically, would reshape our understanding of Siam. Subsequently banned from entering Indonesia, McVey and Anderson would produce influential work on Siam, while mentoring younger scholars through thesis supervision and edited volumes. This collection, Exploration and irony in studies of Siam over forty years, is comprised of nine of Anderson's articles each outlined below, with an introduction by Tamara Loos, a successor of Anderson as director of Cornell's Southeast Asia Program. Loos' introduction places the articles in historical perspective, and in the context of Anderson's own personal history, including his networks of colleagues and students, and his other work. The essays provide an opportunity to reflect on Anderson's contribution to Siam Studies, as they illuminate the influence he had in opening up new directions for research, and new ways of conceptualising Thai politics.