Does anyone know if Jonathan Wright's story Firehouse Down is true or a fabrication?

Jonathan Wright wrote a book called Firehouse Down about the WTC bombings on 9/11. It describes his experience as a fire fighter in the Trade Center.
He spoke at my wife’s school yesterday telling his story. Today an official of the school came in and said that this guy’s story is a total hoax, that he was never near the WTC on 9/11,
Can anyone shed any light on this? My google searches are not finding anything about this.

Thanks to all