Isadora is dreading the maths test on Monday so, with the help of her naughty cousin Mirabelle, she decides to fake being ill with the magic pox to stay at home. When the magic pox potion goes wrong and Isadora's house is invaded with magic pox fluffballs, she learns that maths isn't so bad after all-especially with the help of a mum like hers! Harriet Muncaster Isadora Moon gets the Magic Pox Book