"A Great Brain has trapped Boffin Boy's brave spaceman pal Nigel on the Moon. Then three Moon Zombies land Nigel's spaceship in Boffin Boy's garden! What is going on? With the help of clever dog Katt, and after a nice cup of tea, the zombies tell Boffin Boy their story. Two Great Brains plan to take over planet Earth! Boffin Boy must act -- and quickly! Can he save the Earth from two giant brains? Well, what do you think?"--Back cover.