At all of 13 years of age, fearless Ruby Redfort has seen more than the most adventurous of adults. She's a secret service agent, a position that gives her plenty of chances to exercise her mental and physical capabilities, but also comes with a high risk for injury. In the past she's dealt with a number of villains, but now that her town is plagued by a strange serial burglar and Ruby can't even keep her job, catastrophe might just strike.
The Last Star is the final book of The Fifth Wave trilogy and picks up six weeks after the events of The Infinite Sea. After the Others, an alien race, sent four waves of death they killed seven billion people.