<DIV><I>Day by Day</I> guides have headed the best-seller lists in every year of the past decade, and the reason for their success is that they deal with fast-emerging touristic favorites. Istanbul is the latest example of an immensely-popular new destination. In 184 compact pages profusely illustrated with four-color photos and maps, <I>Frommer's Day by Day Guide to Istanbul</I> takes you to and through the Blue Mosque, Topkapi Palace (and its harems), the Grand Bazaar (operated since 1460), the many Turkish Baths, and more, while never failing to list the practical choices in lodgings, meals, shops, and other attractions.<br></DIV>