Driver mechanic Rosie Sinclair is assigned to General "Buff" Kingsley-Flynn & are sent to the codebreaking village of Cottisbourne where a mole exists transmitting secrets to the Germans。 Professor Hale is murdered， Professor Swann appears the likely suspect。 Rosie， friends Sarah， Maggie， little Nancy， pursue spy Prospero who always seems one step ahead。 Will Rosie & Buff survive？ Driver mechanic Rosie Sinclair is assigned to General "Buff" Kingsley-Flynn & are sent to the codebreaking village of Cottisbourne where a mole exists transmitting secrets to the Germans。 Professor Hale is murdered， Professor Swann appears the likely suspect。 Rosie， friends Sarah， Maggie， little Nancy， pursue spy Prospero who always seems one step ahead。 Will Rosie & Buff survive？ 。。。more