10 books • 7 series
Book #110: Cruise Vacations For Dummies
Book #466: Frommer's Caribbean Ports of Call
Book #370: Frommer's Cruises and Ports of Call
Book #720: Frommer's Cruises & Ports of Call 2010
Book #107: Frommer's Cruises and Ports of Call
Book #434: Frommer's European Cruises and Ports of Call
Book #1: Frommer's Singapore Day by Day