It's possible you're thinking of:
* Louise Erdrich: A well-known American author known for novels like "Love Medicine" and "The Round House."
* Louise Penny: A Canadian mystery writer known for the Inspector Gamache series.
* Louise Fitzhugh: An American children's book author known for "Harriet the Spy."
If you can provide more information, such as a book title, genre, or a specific time period, I might be able to help you pinpoint the correct author.