National Radio Day on Tuesday, Aug. 20, is a time worth noting both the history and future of the news talk radio format, as both the past and president are explored in "The Right Frequency," a book on talk radio's legacy.

Glenn Beck, Rush Limbaugh and Sean Hannity made the Forbes top 100 list of "Most Powerful Celebrities." Their standing represents the standing of conservative talk radio hosts in America.

The Right Frequency: The Story of the Talk Giants Who Shook Up the Political and Media Establishment by Fred V. Lucas hit Amazon's best seller list. It entered the golden circle for two categories: Radio and Public Affairs & Administration

Will the fate of immigration reform be in the hands of talk radio even as popular Republicans are stepping forward to support it?

Mark Levin, Alan Colmes and Mike Gallagher -- all in the Talkers Magazine "Heavy Hundred" list -- endorsed The Right Frequency, a book on the history of talk radio.

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