‘Great Explosions in Hush-Hush Bay!’
Roger, Diana and Snubby read the headline while on holiday at the ‘Three Men in a Tub’ Inn. Who is the enemy agent at the top-secret submarine harbour? Could it be the professor? Or the conjurer who gives Barney a job and says he can trace his father? And what part does the inn porter play in the mystery?
Will Barney finally find his father?
