This is the second book in the Locker Nine series. I was eagerly awaiting this book as I absolutely loved the first one.
In this installment we see Grace re-united with her father Robert at a survivalist ranch only to have to return home without him. When Grace makes it home she is, as the book title says, “under fire”.
The book ends with a nice setup for a third book focusing on Robert fighting for survival at the ranch as it comes under siege.