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In observance of the 2024 holiday season, Sage offices will be closed Monday December 23rd through Wednesday January 1st. Normal operations, including shipping for orders placed during the closure, will resume on Thursday January 2nd. For technical support during this time, please visit our technical support page for assistance options. 

We wish you a wonderful holiday season. Thank you. 

Michael L. Spangle Regis University

For more than two decades, Michael Spangle, Ph.D. has provided training or consulting for a wide variety of organizations including J.D. Edwards, Time/Warner, I.B.M., Inflow Inc., the U.S. Department of Health and Human Services, The National Association of Realtors, and the U.S. Navy, as well as schools, churches, and hospitals. He served as Director of Graduate Studies in Applied Communication and Alternate Dispute Resolution at the University of Denver and Director of Faculty and Curriculum for the School of Professional Studies at Regis University. In addition to a Ph.D. in Speech Communication from the University of Denver, he completed an M.S. in Education from Kearney State College and an M.Div. from Luther Theological Seminary. He teaches university courses in negotiation, mediation, facilitation, team communication, and leadership. He is co-author of two other books, including Collaborative Approaches to Resolving Conflict, also published by Sage.