Wicked! Series by Paul Jennings, Morris Gleitzman

Dawn and Rory hate each other's guts. And now they are to be step-sister and brother. Even worse, something very weird is happening to the worms Rory keeps as pets. But what happens when the Slobberers escape during the wedding is only the beginning.

Dawn and Rory find their parents' car wrecked with blood-stained seats, They begin to panic - was it the slobberers? Will Dawn and Rory be next on the menu?

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.

To solve the mystery and save their step family Rory and Dawn must find Karl. What awaits them in the abandoned refinery, a new beginning or a horrible end? Suggested level: primary, intermediate.