Pandora Kitabevi, just off İstiklal Caddesi near Taksim Square in Beyoğlu, sells both English and Turkish books in its attractive, modern shop.
Books in English about Turkey are mostly on the ground floor, but a large part of the English-language collection is upstairs, so look there as well.
Starting in Taksim Square, walk down İstiklal Caddesi and look for Büyükparmakkapı Sokak ("Street of the Thumb Gate") on the left-hand side between Istiklal Nos. 103 and 105. Pandora is just a few steps up Büyükparmakkapi Sokak on the left-hand side.
Büyükparmakkapı Sokak No. 3, off İstiklal Caddesi
34443 Beyoğlu, Istanbul
Tel +90 212 243 3503
—by Tom Brosnahan
Lots of good books at Pandora!