Trumps real estimated wealth in 2005 when the book was published was no more than $300 million, and then there was the real estate bubble burst in 2007-2008. Impossible to believe Trumps net worth would have increased 20-40 fold in that time.
Trump filed his financial disclosure papers when he got into the race...You can bet Trump is worth what he said he is or Cruz and the other sleezy media types would have been all over it...