This is a fantasy set in an alternate history America--which is part of what makes it so fun. OK, a lot of what makes it so fun. Things seem to have split off from our Timeline at the time of the English Civil War. There's a Lord Protector and Crown Colonies in 1800--but also an American Compact. Benjamin Franklin was reputed a wizard, George Washington was beheaded for treason and Thomas Jefferson a guerrilla fighter, and in American territories Native Americans are full citizens. Oh, and there's magic. One with a definite American folk magic feel. It's a world oh so different than the usual faux Medieval European fantasies that you so commonly find.
And here we have Alvin the Maker--Seventh Son of a Seventh Son. The book opens with his birth and the novel follows him until he's ten years old. Alvin is magical. At one point he makes an oath to use his magic only for others--which so annoyed I was ready to drop the book. What's so wrong with doing for yourself, or so good about doing for others? Doesn't it matter more whether what you do to yourself or others causes harm? But that oath has consequences. And I was particularly charmed by the character of Tailswapper--an alternate universe William Blake, the famous poet and engraver. It's never stated outright, but it's a nice touch. This definitely left me wanting to find out what happens next in this world.