* The Unfinished City (1995)
* The Long, Goodnight of Violet McCarthy (1998)
* The Forgotten Room (2001)
* The Game Changer (2004)
* The Samaritan (2006)
* The New Countess (2009)
* The Shadow Keeper (2012)
* The Collector's Apprentice (2014)
* The Forgotten Room: A Novel of Suspense (2001)
* The Samaritan: A Novel of Suspense (2006)
Nonfiction
* The Poetry of Everyday Life (2003)
* I'm Nobody! Who Are You?: The Life of Emily Dickinson (2008)
* Emily Dickinson: A Biography (2011)
* The Private Lives of Authors (2014)
* The Story of Emily Dickinson (2016)
* The Writer's Guide to Everyday Life (2018)
* The Power of Everyday Moments: How to Live a Life That Matters (2020)
Children's Books
* Henry and the Chalk Dragon (2010)
* Emma and the Magical Bookmark (2011)
* Charlie and the Missing Toy (2012)