Roger LeB. Hooke is Research Professor in the Department of Earth Sciences and the Climate Change Institute, University of Maine. He has been involved in glaciological research for over 30 years, focusing on processes relevant to the origin of glacial landforms. In addition to the first edition of Principles of Glacier Mechanics, he has published over 80 refereed research papers in journals such as the Geological Society of America Bulletin, Geology, the Journal of Glaciology, Quaternary Research, and the Journal of Geology.