Don S. Lemons is Emeritus Professor at Bethel College, Kansas, and previously held a position at Los Alamos National Laboratory, where he conducted research in theoretical plasma physics. He is the author of eight books, including An Introduction to Stochastic Processes in Physics (John Hopkins University Press, 2003), A Student's Guide to Entropy (Cambridge University Press, 2013), A Student's Guide to Dimensional Analysis (Cambridge University Press, 2017) and On the Trail of Blackbody Radiation: Max Planck and the Physics of His Era (MIT Press, 2022). He is a fellow of the American Physical Society and a member of the American Association of Physics Teachers.