Book excerpt: Can't make it to their vibrant churches in Manhattan, California, Wisconsin, or Washington, D.C. to listen to today's most influential preachers? Collected here for your reading pleasure are extraordinary sermons from Timothy Keller, John Ortberg, Jill Briscoe, Mark Dever, Francis Chan, Joshua Harris, Philip Ryken, Joni Eareckson Tada, William Willimon, and others. Includes author biographies.