Forget Me Not by Alexandra Oliva
The description of this one intrigued me even before I realized that it was by the same author as The Last One. I was curious about a little girl raising herself and then escaping the walled off property to the outside world...but this book begins after she's grown up. Set in the near future, it has just enough unfamiliar technology to constantly remind the reader of that...and not quite enough information about Linda's past to keep things interesting. Once she returns to her childhood home it picks up pace. I was more interested in Linda as an almost feral child than I was by her adult life and virtual reality games.
Disclosure -- The publisher provided me with an advance review copy .This post contains affiliate links.