Anne Carroll was called the ""unofficial member of Lincoln's cabinet"" -- and her story, so far as I know, has never been fully told. One gets a line about her here -- a few paragraphs there; Sandburg gives her credit for some of the revolutionary pamphlets of the Civil War, legal documents establishing the war rights of the President, answers to attacks on the Administration, and so on. But never have I run across the story as revealed here. There's a ring of authenticity- and the publishers claim it is based on ""historical facts long buried in the archives in Washington"". I found it fascinating reading, a good story, history revivified, a vital sense of place and period. Many known facts of that dreariest period in Civil War history, for Union sympathizers, take on significance and color. Washington, torn with dissension, suspicion, uncertainties; St. Louis, under martial law, but with Southern sympathies rife; and against the two settings, the romance of Anne Carroll and Judge Evans, serving as Union agents on special mission, as they conceived and put into form the bold plan of using the Tennessee, not the Mississippi as the focus of military operation. Only expediency of the moment- and later Lincoln's untimely death- prevented credit being given where it belonged, to a woman and a civilian, for the plan that changed the progress of the war. This should appeal to the market that liked Immortal Wife, though the title has less emotional appeal.