Rory and Dawn are following the trail of the Slobberers. A snail with Slobberer disease leads them to Howard, the brother Rory never knew he had, and they continue the search for their dad. They fight against gripping, writhing roots that trap them in their car, roots that kill feral pigs as they eat them.
This book is part of the Wicked! Books series and is book #4 in the series.