An unexpected endorsement from al-Qaeda leader Osama bin Laden has resulted in a huge jump in sales for a book by a critic of US foreign policy.
William Blum's Rogue State: A Guide to the World's Only Superpowerwas ranked 209,000 on Amazon.com's sales list before bin Laden mentioned it in an audiotape released last Thursday.
The book reached Number 10 today on Amazon.com's list.
Bin Laden said al-Qaeda group was preparing more attacks in the United States but also told Americans, "It is useful for you to read the book The Rogue State."
Mr Blum said: "I was quite surprised and even shocked and amused when I found out what he'd said. I was glad. I knew it would help the book's sales, and I was not bothered by who it was coming from.
"If he shares with me a deep dislike for the certain aspects of US foreign policy, then I'm not going to spurn any endorsement of the book by him. I think it's good that he shares those views and I'm not turned off by that."
Mr Blum said some friends and family members were afraid the bin Laden endorsement might endanger him, but he said there had been no threats and he was not concerned.
Mr Blum's 320-page book, which was published in 2000, begins with a chapter titled "Why Do Terrorists Keep Picking on the United States." The first sentence says: "Washington's war on terrorism is as doomed to failure as its war on drugs has been."