Sir Paul McCartney is behind a mysterious set of classified adverts that have baffled readers of the Liverpool ECHO.
The music legend took out the ads – about Grandude searching for Nandude - in the ECHO last week.
Grandude and Nandude are characters in his new children's picture book Grandude’s Green Submarine, which is out this week - reports Mirror Online.
READ MORE: Paul McCartney spotted in Liverpool after poignant date
Sir Paul was spotted in Liverpool over the weekend at Lime Street station with his daughters Stella and Mary.
The rare sighting came after Sir Paul paid tribute to his first wife, Linda, on what would have been her 80th birthday on Friday.
Sources say Sir Paul picked the ECHO to place the ad, as it's a paper close to his heart and he is no stranger to taking ads out.
In 1977, he used the pseudonym Percy ‘Thrills’ Thrillington for his album of the same name and took out similarly cryptic ads in a variety of British newspapers.
Grandude’s Green Submarine is the second of his Hey Grandude! books. The first was released in 2019 topping both the UK and US children’s book charts as well as being translated into 33 languages.
The new book sees Paul’s Grandude character on another magical mystery tour with his grandchildren as they search for Nandude.
The classified ads read: "Grandude and his four chillers are looking for their adventure-loving Nandude. Nandude has traversed the thickest jungles and sailed the deepest oceans, always to return with stories to tell. But she’s been gone far longer than we expected! Grandude needs your help! Nandude loves playing the accordion. If you listen out, you might see her before you see her! Have YOU seen Nandude?"
Sir Paul previously said how the book – of which the title is a nod to the Beatles' Hey Jude - came from the nickname given to him by his grandchildren.
He said: "One of my grandkids - who used to call me 'Grandad' - just happened one day to say 'Grandude' and it kind of stuck, so the other kids started calling me 'Grandude'."
Sir Paul liked it so much he started making up stories about a character called Grandude, who he pictured as a kind of retired hippie having adventures with his grandchildren.
He said: "I imagined him as a sort of eccentric old guy.
"He's got a grey beard, a little bit of a ponytail, so he's a little bit groovy. He has a little hat and a bow tie. And he has this magic compass so when he rubs that you can go anywhere."
