The beginning is a little vague on specifics or rather too specific on the dystopian world building, but with no info to go on. It takes a while to be able to see through the maze of branches and groups of new world people, and comprehend the plot.
All I can say is, stick with it. A few chapters in it starts to make a lot more sense and becomes quite an interesting read.
Moon Chosen is set in a world after technology and long after the destruction of society as we know it now. The surviving humans have split into different groups with their own newly built structures and rules. Unfortunately they all view each other as mortal enemies. The Tree people hunt and enslave the Earth Walkers and the Skin Eaters aren’t fussy they will kill and eat anyone.
Mari is a hybrid of two groups, a fact her mother keeps well hidden, because it also means she will be accepted by neither if they discover the truth.
The book is filled with the magic pulled from natural resources, such as the sun, the moon and the earth. The only thing left to rely on when all else has dwindled to to dust and ruin.
There are some tough scenes, which put the book towards the older end of YA for me. Gang rape puts it more in the sub-genre of NA, as far as I am concerned.
The epilogue seems to introduce a further story in the series with a character who just stumbles in towards the end. The emphasis appears to be on single characters and their animal counterparts, which is a shame. I do think the story Cast has built up in Moon Chosen is vast enough to be developed further without throwing in random mate selections whether they be human or not. More dystopian world and less urban fantasy methinks.