For a single tome on Grant, Smith has done a yeoman's job of telling his story in a very detailed yet cohesive manner. Yes, five times more could have been written about him, (as others have,) but not effectually in a single volume.
Smith creates a very compelling story, which for me was quite delightful, (though I have read the other biographies.) In fact, when researching him, I normally like to start at Galena, where Grant was a simple clerk in his families dry goods store, and skip his youth, schooling, and early military career. Yet, when glimpsing these section in Smith's book, they caught me and had me reading them.
I learned more about Grant in this book than I have in others. Major kudos to the author.