Columbus Guides - World Travel Guide: Comoro Islands: Tourist and business travel information with facts on climate, visa, health, passport, currency and customs requirements.
Lonely Planet - World Guide: Comoros and Mayotte: Comprehensive facts and advice for traveling along with background material on the culture and history of this African country.
US State Department - Comoros Consular Information Sheet: Offers Background Notes and travel information including entry and exit requirements, safety and security, crime, health and transport.