Years later I realised I'd lost my original copy, so replaced it with exactly the same edition, mainly for nostalgia reasons. It's still a fun read if you want an insight into early dial-up stuff - it's got a lot of technical stuff in it too about how all the hardware worked.
Later on after PRESTEL was gone, BT security was visiting and freaked out when they bumped into a developer who they had caught as a teenager hacking Prestel.
Security wanted them fired senior management told them NO :-)
Oh I also had a copy of the hackers handbook