Not really a biography of Washington, but a history of the colonial period politics. Decent writing, but there were a lot of things that Marshall didn't know at the time, like the details of the Constitutional Convention, and a lot of things that weren't of particular concern to him, like the impact of slavery on Washington or indeed on the colonies. He does quote extensively from Washington's correspondence, which is both good and bad: you get the original writing, but you don't get much context or interpretation (and Washington was a bit prolix, especially when writing to the Congress during the War about money :) ). There was virtually no experiential material, so don't go to this expecting revelations from somebody who was there: you might as well be reading Flexner or even Freeman. Humphrey's book The Life of General Washington is actually better for that, and a lot shorter :) .