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?

Francesca Simon, illustrated by Steve May