Mr Juniper told the Mail on Sunday: "His Royal Highness, Emily and I had to work very hard to make sure that each word did its job, while at the same time working with the pictures to deliver the points we needed to make.

"I hope we've managed to paint a vivid picture, and like those iconic titles from the 60s and 70s, created a title that will stand the test of time."

Ladybird books traditionally targeted children, but have recently found success with a range of humorous titles for adults.