You can find all the books of the world in the Istanbul second-hand (SAHAFLAR) book stalls....I spent days and days in the passage close to our house (ASK ME FOR DIRECTIONS ) ..asking to myself how a special book could have get here from Italy, France , England ....This is one of the best relaxing way to let yourself go to the city ...tracing the readers and the pages trough the centuries ....
The most famous second -hand books places are in Beyoglu, in Beyazit and in Kadikoy...
One of the oldest and more reliable turkish english newspapers
http://www.homerbooks.com/Product/Product
Homer Bookstore and Publication LLC (‘Homer’) opened its doors in September 1995 with a special focus on archaeology and history publications. Homer is located at Yeni Carşı Street in Galatasaray - Istanbul, opposite to the Galatasaray High School. Since its opening, Homer’s main aim is to provide publications to its customers that are available in Turkey or in overseas both in English and Turkish relating to the archaeology, history and Byzantine Studies.
It is just along our street andreally stuffed of good books in english and other languages ....
Very good choice of archeology book in the close and separated shop for archeology texts ,,,and nice gadgets!