Frommer's Portable Frankfurt

On Being Me: A Personal Invitation to Philosophy

Rick Steves Best of Germany

Germany: 101 Coolest Things to Do in Germany (Berlin Travel Guide, Cologne, Munich, Frankfurt, Dusseldorf, Hamburg, Hanover, Dresden, Stuttgart)

Germany (Lonely Planet)

Germany 7 (Travel Guide)

Travel Guide to Frankfurt, German Beautiful City

Lonely Planet Discover Germany (Discover Country)

City Flash: Frankfurt

Frankfurt PopOut Map (Popout Maps)