This was an impressive and eye opening debut!

Virgil Wounded Horse is raising his nephew on the Rosebud Reservation. He works as an enforcer (as we learn the feds want nothing to do with major crimes on the reservation) so he feels he can give out some justice. Nathan gets involved in some drug business and ends up being put into in a sting.
The second half was full of so many different things but it kept my rapt attention. My heart was in my throat for much of it and what would come next.

Be sure to read the author's note. It gives some great insights into the story. There are ceremonies in the book and the author spent time researching what he could and could not write about the ceremonies.