I'm a voracious fiction reader, most often in the historically-researched and fantasy genres. Rebellion is a wonderful novel which fits neatly into neither. It's mostly fantasy, but without the traditional "high fantasy" elements of dragons, magicians and other humanoid races. Rachel has created a rich world of her own, drawing on earth's history, but changing enough to make it truly her own creation and stop the reader filling in any blanks.
The characters cover the gamut of humanity, including the dark underbelly that we often prefer to ignore. Rachel has carefully trodden the line of what is necessary for dramatic tension and resolution without straying into gratuitous violence, gore and depravity. The main protagonist is a unusual young woman, but she too has her flaws, making her all the more believable.
There are few people I wouldn't recommend this too: an excellent debut novel.