I had a sneek preview and was surprised to see my picture in it.
I don't know you personally or anything, but I find this hard to beleive, because you would definitely know if you are included within a published product available upon the open market. It would be using your image and likeness without your written rights. Publishers and Editors keep a strict lock-down on copyright issues such as this, this is why I find it hard to beleive you had no idea you were included in a book until you saw the "sneak preview". But like I said, I don't know you, you may be in a tiny frame as part of some audience or something... but this is totally my personal presumption, sorry if you find this offensive.