This viking duo will give Horrid Henry a run for his money! What if your parents WANTED you to behave badly? Set in the snowy fjords of a Viking kingdom, the terrible twins, Hack and Whack, are proud to be the best worst vikings....

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?...

Three fantastic new stories! Hack and Whack babysit a toddler – Fire Hazard – and discover to their horror that they might not be the worst vikings in the village after all . . . Then they manage to secure an exciting invite to feast with the visiting king, but discover that it’s three days of having to be on their best behaviour . . ....