Authors:

Theorists write all the popular books on science: Heinz Pagels, Frank Wilczek, Stephen Hawking, Richard Feynman, et al. And why not? They have all that spare time.

Leon M. Lederman, Dick Teresi (1993). “The God Particle: If the Universe is the Answer, what is the Question?”, p.15, Houghton Mifflin Harcourt
Theorists write all the popular books on science: Heinz Pagels, Frank Wilczek, Stephen Hawking, Richard Feynman, et al. And why not? They have all that spare time.