BOOKWhen Jack, Lily and Odinn hear a cry for help emerging from their toilet they know their next amazing adventure has found them. The ocean and a ll i t’s marine inhabitants are in trouble after a hideous sea monster steals the magic blue crystal from the gatekeepers of a lost underwater city.

The world is in lockdown, and Jack has been stuck at home for what feels like an eternity.

When he discovers a mysterious tunnel under his bed, an amazing adventure unfolds for Jack and his little sister, Lily. Together, they discover a magical forest, stop a powerful crystal from falling into the wrong hands, travel to the ends of the galaxy, and fight a gang of mutant hyenas. Along the way, they are joined by Winston, the Tortoise, and Dougie, a Mole whose superb tunnelling skills might just save the day. Or could the secret weapon be a stinky cheese sandwich stuffed inside a pair of underpants?