Constantinople: City of the World's Desire, by Philip Mansel is one brilliant book on the history of Ottoman Empire from 1453 focusing on Istanbul, the Imperial city.
The most prominent feature of the book is its objectivity. Even if you are unfamiliar with the subject, you can still appreciate this feature. More than telling stories it tells you history, by giving numbers, dates, facts and by comparing them to the contemporary countries, civilisations and cultures. Thus you can understand the circumstances of the era and make your own conclusions.
The book is very well-written. It is very pleasant to read and makes you desire to visit this imperial city and see all those historical places with your own eyes.