Alfie's house is invaded by flies. His fly-trap plant is too small to eat them all so the wise old plant uses magic to make it bigger.

Then it gets BIGGER and BIGGER and BIGGER. Nothing is safe! Alfie decides the only place for the Giant Fly Trapper is in the Belching Bogs in Arcania. But to get there he must outwit the creatures of the Nanabur Mines and the deadly worm monster.

Alfie Green and the Fly-Trapper is the fourth book in the Alfie Green series.