Stoneskin

Stoneskin, by KB Spangler 
Tembi Moon is a young girl from the slums of Adhama who finds herself selected by the Deep, a vast alien presence that has conceived a sort of fondness for humanity despite not understanding them very well. As she grows up learning to be a Witch - one of the people who can convince the Deep to teleport huge amounts of cargo across interstellar distances, and thereby serve as the basis for galactic civilization - she discovers that the universe is far more complex than she had thought. And she had already thought it was pretty complex to begin with.
https://kbspangler.com/books/
http://jamesdavisnicoll.com/review/a-restless-spirit-on-an-endless-flight
http://www.rebeccademarest.com/a-delightful-change-of-pace/
http://fleen.com/2017/09/21/unfortunate-happenstances/
Category:Best YA novel (not a Hugo)