The World Factbook is compiled by the US CIA and is just what it sounds like: A bunch of facts about every country in the world. The book also features nice, clean maps of every country and digital versions of the country’s flag.
Since we published the 1996 edition in Logos-compatible format the CIA has dramatically improved the free online edition, but I still find our edition useful. It brings up interesting data on any country-oriented search, and I use it to get background when I’m preparing to talk with someone from another country. It is also easier to run full-text searches against the Logos-compatible version.
Earlier this year we updated our ebook to the 2004 edition. With all the maps and flags it is a big download, but since we just reduced the price to “free”, it is a great value. Enjoy!