In this book, people can get their shadows modified, like maybe have a kings crown on your shadow or butterfly wings. Kinda like getting a tattoo or a piercing maybe.

But there’s more. Some shadows can be grown and detached and live on past the lives of their owners. Your shadow likes to drink you blood, if you feed it. Your shadow may be able to go through a keyhole, solidify on the other side and open the door for you.
Or kill someone. Or be stolen.

Magic.

Interesting read, and entertaining, pretty good plot, well defined characters. But still not recommended by me .