Interesting New Mary Tood Lincoln Book

I noted with interest on the upcoming events of one of my favorite book shops - Book Passage - that Janis Cooke Newman is going to be touring for a book on Mary Todd Lincoln, simply entitled Mary. Their description: "This is an engrossing novel about Mary Todd Lincoln, one of history's most misunderstood women. Writing from Bellevue asylum, where the shrieks of the other inmates keep her awake at night, the first lady finally shares the story of her life--from her tempestuous childhood in the South through the opium-clouded years after her husband's death. Newman is the author of The Russian Word for Snow"

I look forward to reading it, and will post a review thereafter.

What are your "favorite" books on Mary Tood Lincoln and her relationship with AL?