Grey Woves - Robert Muchamore
Spring, 1941. German submarines are prowling the North Atlantic, sinking ships filled with the food, fuel and weapons that Britain needs to survive. With the Royal Navy losing the war at sea, six young agents must sneak into Nazi-occupied Europe and sabotage a submarine base on France's western coast. If the submarines aren't stopped, the British people will starve.
Grey Wolves is the fourth instalment of the awesome Henderson's Boys series. Set in World War II, there series follows Charles Henderson, the founder of CHERUB (Charles Henderson's Espionage Research Unit B), and his team of young agents on their exciting adventures to help Britain fight the war against Germany. The Henderson's Boys books are prequals to the CHERUB series