Newsweek has started a 7 part story of the never revealed secrets of the Obama, Clinton, and McCain campaigns:

This is part one of a seven-part in-depth look behind the scenes of the campaign, consisting of exclusive behind-the-scenes reporting from the McCain and Obama  camps assembled by a special team of reporters who were granted year-long access on the condition that none of  their findings appear until after Election Day.

Full article at Newsweek: Barack Obama – How He Did It