Sukita Reay Crimmel is considered one of the preeminent experts in the modern field of earthen floors. As well as presenting extensively on this exciting technique with organizations such as Aprovecho and Yestermorrow, she is the developer of Claylin - the first commercially available ready-made earthen floor product in North America. Sukita holds a Bachelor of Science in environmental studies and architecture from the University of Oregon, and is co-author of the original edition of Earthen Floors. Sukita lives in Portland, Oregon.

James Thomson got his start with earth building in 2004, and since then has facilitated dozens of workshops and trainings in multiple states and countries, including Panama, Guatemala, Jamaica, India, and France. He also has a background in general construction and a driving desire to find ways to integrate natural building practices into more conventional modern homes. James has participated in many floor installations, both in workshop settings and for paying clients. He has lived on (or near) earthen floors for most of the past two decades and is co-author of the original edition of Earthen Floors. James lives in Williamsburg, MA.