Billy and his Mini Monsters are off to Spain! There are just two small problems - Peep's been seen by the airport guards and Trumpet and Gloop have got lost with the luggage. Can Billy get his Mini Monsters back in time for take-off?

Billy's moving house! But the Mini Monsters have got lost on the way. How will Billy ever find them again? And to add to the confusion, it turns out there's a NEW monster on the scene... 

Billy's scared of the dark, so he's trying hard to stay awake ALL night. But then he hears a squeaky little voice and notices some tiny purple footprints. Not only that, SOMETHING has ATTACKED his cheese sandwich. What could it be? Does Billy dare find out? 

Billy's Mini Monsters really want to go to school with him. But Billy really doesn't want them to. He's got enough trouble with the school bully, Basil Brown. But perhaps having MONSTERS around will be more helpful than Billy imagines...

It's Billy's best friend's birthday, and the Mini Monsters have come to the party too! Gloop gets mixed up with the jelly, Fang-Face is after the cake and Trumpet's been swept away by a balloon. Billy can't save them all on his own, but who can he turn to for help?

Billy hates swimming. It's cold and wet and horrible. And just when Billy thinks things can't get any worse, his pet Mini Monsters turn up at his swimming lesson and make one very big SPLASH...