Michael Brooks, who holds a PhD in quantum physics, is the author of Free Radicals and 13 Things that Don t Make Sense. He is a consultant at New Scientist and has a biweekly column for New Statesman.

Sean Runnette, a multiple "AudioFile" Earphones Award winner, has produced several Audie Award winning audiobooks and has also narrated works by John Steinbeck and Richard P. Feynman. Of his performance of "The Courage to be Free", "AudioFile" Magazine wrote "Runnette s tender approach to every sentence and paragraph helps the author s wisdom glow. Along with the understated power of the author s writing, Runnette s performance makes this one of the most arresting and thought-provoking audiobooks available today." He is a member of the American Repertory Theater company and has toured internationally with Mabou Mines, an avant-garde theater company. Sean's television and film appearances include "Two If by Sea", "Copland", "Sex and the City", "Law & Order", "Third Watch."