Mr & Mrs Smith are back, and this time they have combed white-sand beaches, climbed snow-capped mountains, camped in sun-drenched deserts, and scoured cosmopolitan cities in pursuit of the sexiest boutique and luxury hotels down under   The latest guidebook from the world's boutique travel experts features 33 extra-special properties in Australia and New Zealand. Travelers can choose from a remote tropical island on the Great Barrier Reef; a glamorous safari camp in Australia's Top End; a sophisticated manor in New Zealand's Bay of Islands; and a host of hip city-stays. Each hotel has been visited personally by the Smith team and then reviewed anonymously by a local tastemaker, who share an unbridled account of their escape. As well as evocative photographs and entertaining reviews, there are destination guides covering every practicality from getting around to sniffing out the finest vineyards, shops, and galleries, plus in-the-know details such as the best rooms to book, the top tables in the most special restaurants, and the most secluded beaches. There's even that all-important Smith tidbit, something for nothing, where they suggest great gratis activities. Adding to the luxe-for-less theme, each book comes with an exclusive Smith Card entitling holders to a year's free membership, good for upgrades, hotel discounts, exclusive on-arrival gifts, and other life-enhancing extras and money-can't-buy privileges.