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