A boy and a bear go to sea, equipped with a suitcase, a comic book and a ukulele. They are only travelling a short distance and it really shouldn’t take long. But their journey doesn’t quite go to plan . . .

Faced with turbulent storms, a terrifying sea monster and the rank remains of a very dangerous sandwich, the odds are against our unlikely heroes. Will the Harriet, their trusted vessel, withstand the violent lashings of the salty waves? And will anyone ever answer their message in a bottle?

Brilliantly funny and tender, this beautiful book maps the growth of a truly memorable friendship and explores how, when all else is lost, the most unexpected joys can be found.

Has he spontaneously combusted? (Ted’s theory.) Has he been kidnapped? (Aunt Gloria’s theory.) Is he even still alive? (The family’s unspoken fear.)

Even the police are baffled. Ted, whose brain runs on its own unique operating system, and his older sister, Kat, overcome their prickly relationship to become sleuthing partners. They follow a trail of clues across London in a desperate bid to find their cousin, while time ticks dangerously by…