Have you checked the Book Recommendations sticky? If there aren't any recommendations in that thread for books about jealousy, I suggest Loving Each Other by Leo Buscaglia. It was written a while ago, but he was brilliant about love and relationships. You can read a little bit of his chapter on jealousy if you search for the word using Amazon's "search inside" feature.
The world opens up... when you do.
"Oh, oh, can't you see? Love is the drug for me." ~Bryan Ferry
"Love and the self are one . . ." ~Leo Buscaglia "