Complex sentence: An Irish Reporter Inside the Obama Campaign, which, being officially released on 1 December 2008, was one of the first books published anywhere to cover the entirety of Barack Obama's 2008 campaign for the Presidency of the United States.
Split into simpler sentences: An Irish Reporter Inside the Obama Campaign, which was officially released on 1 December 2008. This was one of the first books published anywhere to cover the entirety of Barack Obama's 2008 campaign for the Presidency of the United States.