Phillip Berryman is an affiliated faculty member in the Latin American studies program at Temple University in Philadelphia. His books include Liberation Theology: Essential Facts About the Revolutionary Movement in Latin America — and Beyond (February 2013).

Joseph Runzo is a professor of philosophy and religious studies at Chapman University in Orange, Calif. He is co-editor of Ethics in the World Religions (OneWorld Publications, 2001).

Steve Johnson is director of character education at the Markkula Center for Applied Ethics at Santa Clara University in Santa Clara, Calif. He has written numerous articles on topics in youth ethics, including cheating and lying.

Bella DePaulo is a visiting professor of psychology at the University of California in Santa Barbara. She is an expert on lying.

Melissa D. Aaron is an English professor at California Polytechnic State University in Pomona. She teaches a literary and cultural studies course on the Harry Potter series.

Author and speaker Berit Kjos, who leads Kjos Ministries in California, opposes the Harry Potter series.

Robert L. Brown is a professor of art history at the University of California, Los Angeles. He has written about Buddhism, asceticism, health and the body.

Prism Weight Loss Program is a Christian program that says it is suitable for nonreligious people as well.

Theodore C. Bergstrom holds the Aaron and Cherie Raznick Chair of Economics in the economics department at the University of California in Santa Barbara, Calif., and is the author of On the Economics of Polygyny (University of Michigan, 1994), which is available online.