She lives in Roslyn, New York - or Millwood. She began writing mysteries in 1979 - but she wrote other books before then.
https://groups.google.com/g/rec.arts.books.childrens/c/yCVKkGlBsAM
(includes very long booklist)
She's also written under the names Olive Blake and Erica Frost.
Lenona.
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