It's not easy being the WORST at everything! Hack and Whack are the very worst Vikings in the village - until a fierce and stinky berserker moves in - NEXT DOOR! WILL the brand new school help the twins outwit this villain and his vicious dog, Muddy Butt? And will Twisty Pants, Dirty Ulf and Elsa Gold-Hair help vanquish this foul fiend? 'As joyously anarchic as Horrid Henry. ' Cressida Cowell 'A great new series for early readers. ' BookTrust 'A wonderfully absurd, anarchic romp. ' Sarah McIntyre 'Immensely appealing to children of five and up. ' Literary Review.