The entire world is at risk as the tentacled creatures flood through the portal, with only Niko and his new friends to stand in their way! But the monsters aren't the only things coming through…
Niko and Rhiannon meet a boy from beyond their world, one who could prove very useful in their fight against the portal pets. With the help of Dr Pool and a young band of superheroes, will Niko be able to keep the world safe and send the monsters back to where they belong? Find out in Niko's Nightmare: Defeat of the Portal Pets, Book Three in the Niko's Nightmare series.