This is the second of two books about the adventures of the Bruce children.These tales are set in the 1950’s when the country was recovering from the ravages of war.The children live on a farm near the south coast. They have repaired the old Treehouse still standing in the orchard on the far side of the farm.Patrick, orphaned in the war, has been adopted by the Bruce family.He has a magical coin that his mother sewed into his jacket before she died in the Blitz.Their previous adventures took them time travelling across Britain.In these tales the Treehouse takes them to a ruined castle not far from where they live.Each adventure features an encounter with a mischievous Hobgoblin called Zigar.They time travel to the castle through different times in history.The children see a banquet, a battle, a royal visit and a dungeon and the facts are historically true – well mostly!