Lee Harris is a pen name for Syrell Rogovin Leahy, who was born in 1935. I can find many Google entries for her books, but apparently she does not have her own website.
From another chat site:
February 26, 2011 at 7:54 pm
"Several years ago, Lee Harris announced that her publisher would no longer publish her original paperbacks."
An email for her is here. I have no idea if it is current or not.
Nuns, Mothers and Others - Lee Harris, Valerie Wolzien, Lora Roberts and Jonnie Jacobs