Newton, Mass.—Questex Media Group announced that it has acquired Five Star Alliance, an online luxury hotel booking service. Financial terms were not disclosed. Five Star Alliance includes a number of luxury hotels as well as newsletters and blogs covering the luxury-hotel market. Five Star Alliance dovetails with Questex’s travel and hospitality group, which includes Luxury Travel Advisor, Premier Spas and Premier Romance, Travel Agent Magazine and Luxury Travel Expo and Incentive Travel Exchange. It also publishes Hotel Design and runs the HotelWorld Expo event.