The book is trash, a hit-piece against Lee and everything associated with roughly half of the America which you claim to love.
With U.S. troops once being killed by those who seek to destroy the UNITED States of America, you still venerate the killers of U.S. troops in the 1860s.
It does give interesting insight into what sort of people would cite it as a solid reference, and their propensity to venerate the killers of Citizens of these States of the 1860's while al quiada terrorists strive for the same goal today.
Most insightful is Shelton's claim that the Confederates sought to "Destroy the government," a charge she makes repeatedly throughout the book. With all her bitching about 'omissions' on the part of other historians, I find it most interesting that she does not mention the restraints put on Jackson after first Manassas, when his desire was to march on Washington and hang those responsible for the invasion of Virginia.
It's as though she's saying that without the South, the US wasn't worth diddly squat. Certainly I have shown more coutesy toward the Northern states than Ms Shelton in this regard.