This collection brings together contributions from ALM researchers and practitioners over 25 years, yet it is only the tip of a much larger iceberg. To date almost 700 papers have been published in successive ALM Conference Proceedings and in peer-reviewed articles in the Adults Learning Mathematics International Journal (ALMIJ). A selection of these papers is included here, chosen by the editors for their intrinsic interest and their contribution to the development of the field. The book is organized into five sections, reflecting some of the wide range of interests and diverse contexts explored over the years: classroom methods; classroom materials; institutional support; workplace and vocational education; and professional development. The chapters offer a smörgåsbord of delights for everyone with an interest in adults learning mathematics.