Game and video game design.
Anything written by Arthur C. Clarke that I can put my hands on,
The City and the Stars by Arthur C. Clarke;
The Fountains of Paradise by Arthur C. Clarke;
The Last Theorem by Arthur C. Clarke and Frederik Pohl;
Foundation series,
Prelude to Foundation by Isaac Asimov;
Forward the Foundation by Isaac Asimov;
Foundation by Isaac Asimov;
Foundation and Empire by Isaac Asimov;
Second Foundation by Isaac Asimov;
Foundation's Edge by Isaac Asimov;
Foundation and Earth by Isaac Asimov;
Any shortstory by Isaac Asimov;
Warhammer 40K
Adeptus Mechanicus : Skitarius by Rob Sanders;
Adeptus Mechanicus : Tech-Priest by Rob Sanders;
Primogenitor by Joshua Reynolds;
Clonelord by Joshua Reynolds;
Ciaphas Cain by Alex Stewart;
Chains of Golgotha by David Annandale;
Imperial Creed by David Annandale;
The Pyres of Armageddon by David Annandale;
All 56 books from "The Horus Heresy" series especially the following:
Legion by Dan Abnett
The Master of Mankind by Aaron Dembski-Bowden
Praetorian of Dorn by John French
Siege of Terra: The Lost and the Damned by Guy Haley
The Last Kingdom by Bernard Cornwell Series;
A Song of Ice and Fire by George R. R. Martin.
Mostly Sci-Fi, not much of a Fantasy guy.
Anything that has a story or anything that allows me to create the story;
All recent Grand Strategies games from Paradox;