Kyobo at gangnam station is massive - multiple floors including solid english section for browsing. Recent releases, korean literature in translation, proper travel guides. Different strengths than specialty bookstores - broader selection but less curated.

Hidden gem is reading spaces where you can browse before buying. Quiet areas, decent atmosphere, escape from shopping madness below. Open until 10pm most days. Good for general browsing when you're not looking for specific literary recommendations.