Paper Guidebooks:

Fodor's Provence and the Cote d'Azur, 2006

Lonely Planet Provence and the Cote d'Azur, 2005

Michelin Green Guide Provence, 2005

Time Out South of France, 2006

Blue Guide Provence and the Cote d'Azur, 2003

Rough Guide Provence and the Cote d'Azur, 2003

On the Web:

Schmap Marseille Guide (free guidebook with detailed maps in English)

Official City Website (in French)

Guide Marseille (good Web-based guide in French)

Marseille Metro Guide (in English)