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Levain Bakery's co-founders have released a book detailing their 30-year journey in business.

They will discuss the book on Dec. 4, National Cookie Day, at an event in Cambridge.

Ten percent of the book's sales will be donated to a nonprofit, Hot Bread Kitchen.

Levain Bakery started as a small bread shop in New York, and has since grown to 20 locations nationwide.

Who doesn’t love a fresh-baked cookie?

Plenty of eastern Massachusetts bakeries sell them, but if you're looking for something unique to give this holiday season, visit Levain Bakery in Boston's Back Bay or Seaport neighborhoods. You can also shop online for Levain’s holiday cookie tin assortment , cookie ornaments , a cookie-scented candle or its 30th anniversary coffee table book, “Levain:

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