The premise was good, and I liked the title as well. Unfortunately, those were like the only positive aspects I recall from reading the book.
It is about the people who had chance-meetings with the terrorists who later hijacked the planes on 9/11. But it was so boring. It took me a lot of discipline to pick up this book each day and finish reading. Nothing really happened, or I just couldn't care about it.
Part of the problem was probably in the writing. There should be a balance between showing and telling, which was absolutely absent. And everything is spelled out before you, all the tragic backstory is told, nothing is just implied. (As if the author didn't believe we could find out some things ourselves)
I was really disappointed, I wouldn't recommend it.
Note: I read a Dutch translation of this book