In November 2011, she published the book, American Bombshell: A Tale Of Domestic And International Invasion, described as a roman à clef.

In this breakthrough novel by political and media figure Rachel Marsden, Catherine Carson is the newest right-wing television star and co-host for America's top-rated television news network: BUX News. Carson, a former Republican strategist and Iraq War spin doctor, is known as a gifted sniper in both political backrooms and on-air verbal combat, but quickly discovers that no battle compares with those fought in the corridors of the television news giant. Suddenly leaving the network in a storm of speculation, she heads to Paris, France, on vacation – the last place anyone would expect to find an American right-wing opinion leader. A chance encounter leads to a new position advising the eccentric President of France, as Carson falls under the spell of the country's most popular politician – the President's nemesis – who seduces her into the biggest fight of her life, on the battlefield of love. In both work and romance, she wonders if she finally may have pursued her quest for adventure too far.