The Trove — Tobias S. Buckell

Jane Hawkins lives on a floating space port where she tries to help her mothers run a failing inn. Every day she watches starships land from far-off places, bound for exotic adventures.But a new occupant under their roof is about to change everything. His name is Villem Osteonides. More machine than man, he's crewed aboard ships that sail through the universe faster than light.And he has a secret that will change Jane's life forever.