Here are some of her notable works:
Seabrook Series:
* The Seabrook Beach Mystery
* The Seabrook Summer Mystery
* The Seabrook Winter Mystery
* The Seabrook Christmas Mystery
* The Seabrook Halloween Mystery
* The Seabrook Thanksgiving Mystery
* The Seabrook Spring Mystery
* The Seabrook Valentine's Mystery
* The Seabrook Fourth of July Mystery
* The Seabrook Fall Mystery
* The Seabrook New Year's Mystery
* The Seabrook Easter Mystery
* The Seabrook Anniversary Mystery
* The Seabrook Graduation Mystery
Other Series:
* The Cranberry Cove Mystery
* The Lighthouse Cafe Mystery
Stand-alone novels:
* A Seabrook Christmas
* Seabrook Secrets
* A Seabrook Mystery
Anthologies:
* A Christmas Mystery
* A Cozy Mystery
* A Mystery for All Seasons
It is important to note that this list may not be exhaustive. Deborah Du Nann Winter has written many other books, including novellas and short stories.
If you're interested in a specific book or topic, I recommend searching online for her bibliography or visiting her website.