Comment These had an impact on me (Score 1) 700
There are lots but I think these made tangible changes to the way I think
Animal Farm - My Dad was a socialist, its was the first time I questioned his political dogma
The Amiga ROM Kernel manuals
Code Complete - 1st ed. Steve McConnell
The Art of Electronics - Horowitz & Hill
The BSA Bantam Haynes Manual - 32 years on I'm still spannering bikes
The Camel book
RSGB Radio Communications Handbook (an ancient pre-transistors copy)
The Cuckoos Egg