The Heavyweight Championship has long been the most valued prize in all of sports. Famous names among the champions include John L. Sullivan, Jim Jeffries, Jack Johnson, Jack Dempsey, Joe Louis, Rocky Marciano, Muhammad Ali, Mike Tyson, Vitali Klitschko and Wladimir Klitschko. A Brief History of the Heavyweights 1881-2010 traces the contests of these champions and other outstanding fighters of this weight class from the early bare knuckle days to the present. The author includes his rankings of the best boxers and bouts of different time periods in history as well as his all-time best rankings. The book is comprised of 308 pages, including numerous photographs, bout-by-bout lists of title contests, and an index. Tracy Callis is a member of the International Boxing Research Organization, the Director of Historical Research for The Cyber Boxing Zone, an internet boxing website, an Elector to the International Boxing Hall of Fame, and a member of the Advisory Board of the Boxing Hall of Fame - Luxor Hotel Las Vegas. He is also co-author of the books Philadelphia's Boxing Heritage 1876-1976 and Boxing in the Los Angeles Area 1880-2005.