Riley 3.0. Riley Series, #3

Where have all the stars gone?Living ten billion years in the future, twelve-year-old Darby has plans to follow in the footsteps of her explorer uncle Max and her lost father, to see the universe, or what's left of it. She uses her unique talents to clear her path. Spaceships, AIs, and a once human friend are her tools. Twenty years later, her final destiny is not what she or anyone else could have expected.
Excerpt"Uncle Max says, even at twice the speed of light you can't outrun your past or your future. Mom says not to listen to him. We're the last, but everyone says the final thing is a long way off. Max isn't so sure. He told me he's looking into it."