"Masters of Deception: The Gang That Ruled Cyberspace" is a true crime story covering the late 80s/early 90s era of hacking in the US, and a conflict[0] between two prominent hacker groups of the time - LOD[1] and MOD[2] - which mostly consisted of smart teenage kids who were just obsessed with computers and telephone networks. It's unquestionably one of my favourite books.

[0] https://en.wikipedia.org/wiki/Great_Hacker_War

[1] https://en.wikipedia.org/wiki/Legion_of_Doom_(hacking)

[2] https://en.wikipedia.org/wiki/Masters_of_Deception