Located quite close to the Grand Bazaar you will find this lovely book bazaar. Although the majority of the books are in Turkish you can still find a small selection in various foreign languages. Vendors are generally congenial and helpful.
Some of the tiny shops have a selection of ancient prints. The sellers are not pushy and will happily permit you to peruse their selection. Unless you get totally immersed in some of the volumes you can likely survey the whole place in less than an hour. Early morning is best to avoid the crowds. Negotiating is likewise encouraged.