Built in 1631 by the Moghul emperor Shah Jahan after the death of his wife, Mumtaz, the Taj Mahal is one of the world's few instantly recognizable architectural landmarks, "an expression not only of supreme love but also of confident power and opulent majesty." To tell its story, the Prestons (A Pirate of Exquisite Mind), British historians, trace several generations in the violent family history of India's Moghul rulers and the elaborate mausoleums they built. Though Shah Jahan???⒠??who ascended to the throne after killing his brother???⒠??undoubtedly loved Mumtaz dearly, their lives turn out to have been slightly less romantic than the legend. Mumtaz died while delivering the 14th child of their 19-year marriage, after which her husband honored her wish that he never take another wife but relied on the constant companionship of concubines. It's the family saga and the exotic palace life that hold the Prestons' attention, but they supply just enough architectural details to satisfy those who might be more interested in how the building supports its massive central dome. Though many questions about the Taj remain unanswered, this small history breaks through the legendary facade to reveal a powerful backstory. 8 color and 55 b&w illus.