After his father goes to war 15 year old Londoner Tom Grattan is sent to Yorkshire. There he is thrust into an unknown world that he finds both scary and exciting. He settles in quite well, but wonders about the man skulking on the rocks.
Tom is convinced that the mysterious intruder at the Kirkby farm is Julie's father.
Tom and Julie explore a deserted mine from which they hear mysterious deafening noises.
Tom solves the mystery of the mine - but not before the most terrifying ride of his life!
Soldiers arrive at the Kirby's farm looking for two escaped German prisoners.
Julie tries to help the escaped Germans, and finds herself in danger of her life.
Tom is branded a 'German lover' when he helps a local farmer with a German name.
Tom is overjoyed when Stan's son, Frank, comes home on leave
Tom sees a robbery by the Townsend Gang but, with Stan their captive, must remain silent.
With Julie's help, Tom rescues Stan from the clutches of the Townsend Gang.
Tom finds his place as 'man about the farm' usurped by a wounded soldier.
Tom and Julie enjoy a walk to the lighthouse - and unknowingly walk into adventure.
Can Tom find a way to prevent a number of English warships running aground?
A birthday letter from Tom's father is stolen and a dangerous paper chase ensues.
Tom and Julie are captured by sinister saboteurs with a plan to blow up a troop train.
Tom is caught up in a gun battle between soldiers and saboteurs.
Tom suspects that a Regimental Sergeant Major's grandson fears becoming a soldier.
Tom finally learns the truth about Christopher's 'cowardice'.
A German POW is shot. Should Tom reveal what he knows to the authorities?
A man who has lost his only son in France plans a terrible fate for Germans working at the quarry.
Tom wants to help a shell-shocked soldier recover his memory - but how?
Tom's new friend turns out to be a rich lord as two tinkers are pleased to learn
Tom has a spookily original plan to help rescue Lord Beck from his kidnappers.
In the dark cellars of a nearby castle, an inventor is working on a new weapon
Tom and Julie are trapped in the castle dungeons, and Stan has a hair-raising trip!
Tom embarks on a dramatic airborne chase when Julie is captured by German agents.
