Blast off on the biggest micro-adventure yet with the popular Project X characters Max, Cat, Ant and Tiger and their new robot micro-friend, Eight.Carefully levelled and highly motivating, this book is ideal for independent reading.The micro-friends accidentally wake up an ancient and terrifying rust monster called Rustan!When Rustan touches the Excelsa, the crew have to make an emergency landing on a nearby planet, Mechio (a planet of metal robots), before their ship crumbles with rust.Unfortunately Rustan follows them to the metallic planet.Ant comes up with a plan to help the Mechions get rid of Rustan for good, but time is running short This book also contains notes on the inside front and back covers that highlight challenge words, prompt questions and give a follow-up activity to support children in their reading and comprehension skills.