 In 1991, she moved out of her apartment in New York and for the remainder of her life, voluntarily lived in various New York City hospitals.In February 2010, she became the subject of a series of reports on after it was reported that the caretakers of her three residences (including a $24 million estate in Connecticut, a sprawling seaside estate in Santa Barbara, California and her Fifth Avenue apartments valued at $100 million) had not seen her in decades.These articles were the basis for the 2013 bestselling book "Empty Mansions