A teenage fantasy in a world where humans have enslaved colossal insects and snails, a war erupts around Jack Briar as he travels to Industry-Stump.
In a world where humans have exploited giant insects as engines of industry and war, Jack Briar was used to a slow life in the small but sheltered town of Rockweed. Then he received a fortune from his absent Father, along with a letter instructing him to travel to the capital city, Industry Stump.
Jack begins his journey on the vast transport Snail Ponderous. But soon, as Spiders’ eyes glitter in the darkness of the roadside and long chitin legs stalk the convoy, Jack realises that he is witnessing the start of a brutal invasion.
When he gets separated from the Snail, Jack strives to find another way south as everyone flees the war. He meets Lily Sporeson and her uncle, and finds that his friendship with Lily gives him his only hope as he toils onboard the vast, strict decks of fighting beetles.
The army needs to reach Industry Stump for one last chance to win this terrible war, and Jack needs to get there not just for his own protection and to find Lily, but to discover why his Father, whom Jack has never even met, sent him his vast fortune.