THE MAGIC OCEAN SLIDE. On the hottest day of the year, Katy, Cassie and Zia imagine a water slide coming out of Katy's bedroom window. As they plunge into an underwater world, they can't wait to explore. But when they meet a dolphin in distress, they realise the ocean is in big trouble . . . THE GIANT CONKER. The friends' latest adventure takes them to an enchanted forest where they set out in sea...