Going to Shinjuku through the JR Yamanote line, the JR Saikyo line or the Meiji Dori Road.
Talking about booksellers in Shinjuku, it is Kinokuniya Shoten. They keep foreign books. The main Shinjuku store is famous as a place to arrange to meet, though Studio Alta on the side of Kinokuniya may be more famous now. Nowadays, the south Shinjuku Branch of Kinokuniya in the Takashimaya Times Square attracts more people. It is a trendy, a fashionable and a large scale bookseller. South Shinjuku Branch is not in Shinjuku-ku but in Shibuya-ku.