Though perhaps better known for her tumultuous marriages to the painter Lucian Freud and poet Robert Lowell, Caroline Blackwood remains a woman whose formidable intellect and artistry indelibly marked every person she met and every sentence she crafted. When he interviewed her a year before her death in 1996, The New York Times chief art critic, Michael Kimmelman, called Blackwood a "strangely dramatic woman: intense and vulnerable, with . . . a dark, razor-sharp sense of humor and an offbeat sensibility."

The same can be said of the mostly female, and often troubled, characters in...