<p>In David Orsini's compelling novel&nbsp;<em>Prisoners of Desire</em>&nbsp;four persons consent to a marriage experiment that involves an exchange of partners. For a while this experiment brings new pleasures and longed-for exhilaration. Eventually it anchors itself to sado-masochistic abuse as well as to sensual pleasure. It ignites the men's fury and imperils the women's safety.&nbsp;&nbsp;&nbsp;</p>