Galastra: The Space Adventures of J.B.R. (Book One: Arrival) by Heather Sharnette
Approx. 108,670 words.
Published on December 27, 2011.
When 13 year-old Beth Ryder and her widowed mother move to a new home by the sea, their lives are changed forever when they meet a friendly family of aliens from another galaxy. Beth eventually learns the amazing truth about her new friends, and her ordinary life becomes extraordinary when she and her mother are invited to live with the aliens on their magnificent starship called Galastra.