Kind of bad. In general it reads like a talented undergrad's paper, or maybe an autistic grad student's. The book suffers from a lack of context; often it will just start listing out facts and anecdotes without explaining how they fit into the larger picture of the war or why the actions were taken. Also has virtually no maps, and no useful maps, which is a problem when your book is all about the maneuvering of cannons and trenches in order to pull apart various forts. The ending is also somewhat disappointing; after a two year siege, the confederates just evacuated because they needed the troops elsewhere. They will need to jazz that up in the Hollywood screenplay.