btschaegg

I personally believe that it's a very useful book to have read (or listened to) if you're going to write any software that humans interact with

something by Terry Pratchett (although I couldn't single out a book there, either)

I still maintain it to be one of the best SciFi novels I've ever read.

Maybe also Flowers for Algernon (Daniel Keyes) for being a really creative concept (the way the story is told) and for being a wonderful example on how interesting modest sci-fi can be

Douglas Adams' Last Chance to See

Walter Moers' The City of Dreaming Books

it's also full of weird insights because of his often rather unique perspective on things. Plus, it's Adams, so it's very entertaining.

Measuring the World by Daniel Kehlmann, specifically for how well he got me to understand Gauss' weird reactions and motives

Friedrich Dürrenmatt's The Physicists. Grim yet humorful.