Have just read
The Ballard of Johnny Madigan, a good yarn about a young lad from NY who joins the Union Army and fights at the
Battle of Fredericksburg, Viginia, in 1862 and eventually ends up guarding the Treasury Building in Washington DC, when the plot becomes more complex. I found the first few pages a tad slow, but soon found myself enjoying this book, particularly all the historical references and when I reached the rather abrupt end, was left wanting more. A memorable first novel by John Bray; perhaps he will write a sequel.
Addendum
Coded American Civil War message in bottle deciphered
Now reading another novel about civil war,
Treason, by Meredith Whitford, which begins in 1461, during the
Wars of the Roses.