These still exist :-) I have a few for my kid. The've been modernised though....
(,
Mon 27 Feb 2023, 11:33,
archived)
No Big Chief I-Spy?He was always a bit dodgy, as cultural appropriation goes.
(,
Mon 27 Feb 2023, 11:41,
archived)
You're mistaken, it's a reference to MI5, who sponsor the books. 
mofaha ┐( ˘_˘)┌ ʅ(́◡◝)ʃ,
Mon 27 Feb 2023, 12:24,
archived)
Low key espionage Our Man in Havant
(
Dick Wonder ₐ wₒₙₖy, wₐᵥy wₒₙdₑᵣ,
Mon 27 Feb 2023, 12:44,
archived)