A laugh-a-minute, worst-day-ever adventure full of hilariously witty illustrations and famous faces from history!

Nine-year-old Billy is digging for buried treasure when … he finds a wormhole in the garden! And to make matters worse, all sorts of people from the past begin to clamber through it.

Now Billy – aided by his pet dog, Shakespeare – is in a race against time to close the wormhole and round up all the people who have slipped through it, before history is changed for ever! No pressure then…

• The third book in this fresh and funny series about sky-high scenarios and hilarious consequences, by the award-winning author/illustrator of The Day that Aliens (Nearly) Ate our Brains. 
• Guest appearances from key historical figures including Shakespeare, Queen Victoria and even Einstein! 
• Jam-packed with humorous illustrations, wonderfully wacky characters and bonus activity pages.