Hidden tearoom is the real treasure here.
This is a Korean bookstore smack in the middle of the little Korea neighborhood. It is well equipped and the service is satisfactory. However, the true value of the bookstore lies on the almost hidden second floor where one can find a traditional Korean tea room in a setting that is more Korean than I've been able to find so far. They serve coffee and a variety of home made teas that are brewed fresh on the spot. I recommend Ginseng (it really works :) To top it off, the atmosphere is relaxing and light years away from the busy first floor and the street. The dedicated hostess added to the effect by preparing and serving the items in a unique ceremonial fashion.
This bookstore wouldn't deserve second looks from a casual passer-by if it weren't for its treasure on the second floor.