In the introduction, Mr. Obama acknowledged his use of pseudonyms, composite characters, approximated dialogue and events out of chronological order. He was writing at a time well before a recent series of publishing scandals involving fabrication in memoirs. “He was trying to be careful of people’s feelings,” said Deborah Baker, the editor on the first paperback edition of the book. “The fact is, it all had a sort of larger truth going on that you couldn’t make up.” Finally there is this last bit and it shows why the Corsi book is a game changer even if it ends up...