"Despite her jealously guarded wish for privacy, if you have her e-mail address, she's a sucker for provocation, and will probably reply," writes Stephen Davis in the introduction to his revealing page-turner of a biography, More Room in a Broken Heart (amazon.com), about singer-songwriter Carly Simon, who Davis has known for some 40 years. Although it's an unauthorized story of Simon's incredible life, the Grammy-winner helped Davis fill in a few blanks, making this an all access, at times shocking tale of success, excess, turbulent romances, financial crises and, in the end, survival.