David Wolman, a contributing editor for Wired.com and author of "The End of Money," will speak about the impact of going cashless at a free lecture Sept. 19 at Iowa State University. In his book, Wolman investigated the future of money, examining an array of virtual and alternative cashless currencies and technologies, including mobile-based banking systems. He also included his personal experiment of a year without cash. Wolman has written for The New York Times, The Wall Street Journal, Time, Newsweek and Forbes. His 2008 story for Wired about how Egyptian activists used Facebook to mobilize against the Hosni Mubarak regime evolved into "The Instigators," an e-book that was nominated for a 2012 National Magazine Award for reporting. More information about ISU lectures is available online.