126 books • 16 series
Book #4: Biggles Delivers the Goods
Book #6: Biggles Flies West
Book #7: Biggles Goes to War
Book #9: Biggles Defies the Swastika
Book #10: Biggles and Co.
Book #2: Biggles, Secret Agent
Book #1: Sergeant Bigglesworth, CID
Book #2: Biggles: The Second Case
Book #3: Biggles on the Hunt
Book #3: Biggles Takes The Case
Book #8: Sergeant Bigglesworth, C.I.D. (illustrated)