Fisherwitch — Susan Gates

It's a hot, lazy afternoon in Africa. Everyone is indoors, keeping out of the sun. Everyone except Precious and her little brother Moses - they're out by the lake. They've just seen something magical - a mysterious blue ball that hovers in the air, sparkling with a thousand tiny rainbows...; The Moses disappears! Precious is worried. Especially when Gran tells her that Fisherwitch is back, and she's hungry.