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.'"
"I was quite surprised and even shocked and amused when I found out what he'd said," Blum said on Friday in an interview with Reuters Television in his Washington apartment.
"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 U.S. 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."