If you've ever experienced the "Just one more turn" syndrome when playing strategy games, this is a must.
Sid Meier has created many more games than just Civilization series. The book describes the journey from the first one to the most current one.
While the book paints a big picture and gives some background, it spares a lot of details. Things often "just happen". Even without the details though, it was a fascinating read and it lets you peek under the hood, though not too far.
Brings back memories.