[ramzeus]

Wikipedia is a quite good repository of all sorts of information. You can always clone that at put it on your computer for offline viewing.

[noir_lord]

You can also make a proper book[1] from a series of wikipedia articles (mixing and matching what you want) to generate a properly indexed book.

Laser print that on acid-free archival quality paper, bind and put in a dark, dry place and it'll outlive us all.

[1] https://en.wikipedia.org/wiki/Help:Books