10 books • 7 series
Lonely Planet Discover California (Travel Guide)
Lonely Planet Best of California (Travel Guide)
Lonely Planet Experience USA (Travel Guide)
Lonely Planet California's Best Trips (Travel Guide)
Lonely Planet Costa Rica (Travel Guide) (Lonely Planet Costa Rica (Spanish))
Lonely Planet Coastal California (Travel Guide)
Lonely Planet Colorado (Travel Guide)
Lonely Planet Chicago de Cerca (Lonely Planet Chicago Encounter (Spanish))
Chicago (Lonely Planet Encounter Guides)