If you're going to Turkey in general, then before I get this, I would get DK's Turkey, which includes Istanbul in its description. However, if your main purpose in traveling to Turkey is spending a couple of days in Istanbul and nowhere else, then Top 10 Istanbul is the pick. I find it's descriptions excellent and accurate. I just returned from a trip to Turkey, my second in two years, and love their recommendations. If you have limited time, then you MUST see Topkapi Palace, Haghia Sophia, Blue Mosque, and the Archaeological Museum, shopping at the Bazzar at the end. I have not visited the last 5 places they list, so obviously I've taken their Top 5 considerations most seriously and have not been disappointed. If you're spending a day or more in Istanbul, this is the book you should get.