When a little boy's ball disappears down a mysterious hole in the garden, he can't stop thinking about what could be down there - a little mouse's house? The lair of a hungry troll? Or maybe even a dragon's den. Whatever it may be, he's determined to find out! A glorious imaginative adventure from the award-winning creator of AUNT AMELIA and LUNCHTIME, and illustrator of THE PAPER DOLLS, written by Julia Donaldson.