Your goal is to hasten the rebuilding of civilization. Anything on a computer is fair game.
This thread has a purpose. Modern technology has given us an unprecedented, largely decentralized access to the majority of institutional human knowledge. As developers, we are natural vanguards to maintain this knowledge in times of global crisis. I'm sure other organizations to this end already exist, but a fresh take by outsiders is always refreshing.
1. First aid
2. Home medicine
3. Edible local plants
4. Hunting, especially building traps from local materials and deploying them
5. Low-tech water purification techniques
6. Basic carpentry
7. Newton's Principia, because at some point things will start getting better.
Electronic media require too much infrastructure to use. They degrade much faster than paper. Books on electronic media can be collected - just don't expect to be able to use them.
If the event is known, then the book list can be adjusted. For example, if it's nuclear, then "The Nuclear War Survival Guide" is a must-have:
Also, historically speaking, most population groups refuse civilization when provided the option. The visible concern to non-civilized groups when gazing upon civilization are loss of independence, loss of social equality, and social restrictions. Typically groups only accept civilization once wealth becomes sufficiently abundant, military defense of fixed areas requires fixed resources, and influence becomes more important than wealth.
That being said I would take no preparations to rebuild civilization.
What you're forgetting is the ingenious yet frustrating quality of children to summarily reject almost all faith and/or dogma their parents foist upon them. That tied together with the hundreds of years it would take to rebuild a civilization and you have a simple recipe to frustrate any realistic prepper with ambitions of accelerating the good-old-bad-days (aka the bad-old-good-days).
Well then I vote Sid Meiers Civilization.