I really enjoyed the Frontlines military sci-fi series and I was a bit sad when it came to a close. I commented in my review of the series finale that I hoped that the main story arc would be picked back up with a new generation of characters, since it was not resolved to my satisfaction. This book doesn't exactly extend the main story arc, but it does take place in the same universe and perhaps it sets the stage for exactly that. This is a story about Alex Archer, a dog handler on the planet Scorpio, which was taken over by the Lankies 8 years ago. Since then, the few remaining humans have lived underground, venturing out of their bunker only for scavenging runs to pick up supplies. These runs are extremely dangerous and their numbers continue to dwindle. Alex, and her dog Ash, accompany the military patrols on these runs because Ash is an early warning system capable of detecting Lankies before they can be seen. This book tells the tale of what might be the final scavenging run ever after it all goes catastrophically wrong...