Books Recommended by Sid Meier
The Macmillan World History Factfinder
Colin McEvedy
Source: "The idea for a tech tree, which I think was unique and original to Civilization, came from [this book]." - Sid Meier
Sid Meier is a Canadian-American programmer, designer, and producer of several strategy video games and simulation video games, including the Civilization series. Wikipedia
Source: "The idea for a tech tree, which I think was unique and original to Civilization, came from [this book]." - Sid Meier