CIA World Factbook
Succinct and factual details about each country; country rankings.

Background Notes
Detailed histories,economic and political conditions, as well US relations with each country.

Europa World Year Book (print)
Authoritative and substantive country profiles.

Country Commercial Guides
Political and economic conditions and regulations that affect doing business there.

Country Studies - Library of Congress
Detailed profiles coevr history, economic conditions, social structure, etc.

OECD Country Information
Overviews and statistics on OECD member countries - about 30 countries included.

BBC News - Country Profiles
Overviews and BBC news by country.

MarketLine
In depth country statistics - economic indicators, industry and demographic data.

Global Market Information Database
International socioconomic data, including industry statistics and country information.

Culturgrams 2009 World Edition (print)
Profiles include information on lifestyles, greetings and gestures.

Countries and their Cultures (online and print)
Profiles include sections on history and ethnic relations, economy, political life, gender roles.

• Kiss, Bow or Shake Hands: How to Do Business in Sixty Countries (print)
• Doing Business Internationally: The Resource for Business & Social Etiquette (print)
• Dun & Bradstreet's Guide to Doing Business Around the World (print)
• Communicating Across Cultures at Work (print)
• Doing Business Internationally: The Cross-Cultural Challenges (print)
• Passport to Success: The Essential Guide to Business Culture and Customs in America's Largest Trading Partners (print)

... on commonly researched countries

• Brazil
• Chile
• China
• Colombia
• Czech Republic
• Egypt
• Hungary
• India
• Indonesia
• Malaysia
• Mexico
• Morocco
• Peru
• Philippines
• Poland
• Russia
• South Africa
• South Korea
• Taiwan
• Thailand
• Turkey

If you want me to add a country here, feel free to send me an email.