Helander, P., Wolf, R. C., Ida, K., Schmitz, O., Blackwell, B., Moissenko, V., et al. (Eds.). (2016). Special Issue on the 20th International Stellarator-Heliotron Workshop (Greifswald, Germany, 5-9 October 2015) [Special Issue]. Plasma Physics and Controlled Fusion, 58(5-11):.