The authors interviewed over 300 sources for the book, relying on expert and witness accounts.

The authors also interviewed federal and local investigators in terrorism cases throughout the 1990's.

The author interviewed him and detected "physical manifestations of deception."

Question: Did the author actually interview any of these "girls"?

The author also repeatedly interviewed Gardner's mother, a psychiatric nurse.

The author interviewed Baker in state prison after his conviction and sentencing.

The book provides many references and the author interviewed many witnesses.

The author, daughter of a black father and a white mother, has interviewed 46 Americans with a similar biracial heritage.

The author last interviewed the Obamas in 2009 for a magazine piece.

These same authors interviewed patients at other alternative cancer clinics in Mexico.