Island of dolphins

For personal reasons, Juliet was glad to be going off to a tiny Caribbean island to help an author work on a book about dolphins. But she arrived to discover that the author in question was not, as she had expected, Mark Bannerman, but his brother James — and so began a whole new set of problems for Juliet. For, despite the fact that Mark made his dislike and distrust of her plain, she felt more and more attracted to him; while James, whom she liked but did not love, made it equally plain that he did love her. Between the two of them, how could she escape unscathed?