J. Daniel Hays is a co-author of the Dictionary of Biblical Prophecy and End Times. Hays is on the faculty of Ouachita Baptist University in Arkadelphia, Ark.

J. Scott Duvall is professor of New Testament at Oachita Baptist University in Arkadelphia, Ark., where he also holds the J.C. and Mae Fuller Chair of Biblical Studies. Duvall is a co-author of the Dictionary of Biblical Prophecy and End Times.

Tim Warner is pastor of Oasis Christian Church in Tampa, Fla., and author of the website Answers in Revelation.

Thomas B. Slater is a professor of New Testament at Mercer University’s McAfee School of Theology in Atlanta. He has said that Family Radio’s billboards claiming that Jesus would return on May 21, 2011, were inherently misguided.

The Rev. Jonathan Marlowe is co-pastor of Gibsonville United Methodist Church in Gibsonville, N.C. He preached a four-week sermon series on the Book of Revelation and blogged about it.

Kenneth L. Gentry Jr. is an ordained minister in the Presbyterian Church in America. He is the author of several books on Revelation and lives in South Carolina.

Rebecca Denova is a lecturer in religious studies at the University of Pittsburgh in Pittsburgh, Pa., where she has taught a course called “Apocalypse Then and Now.”

Bishop Terry Wiles is leader of Crossroads Community Cathedral in East Hartford, Conn. The church lists a literal belief in the Rapture as central to its members’ faith and membership.

John J. Collins is a professor of Old Testament interpretation and criticism at Yale Divinity School in New Haven, Conn. He is an expert on Jewish apocalypticism.