Hello,
Here are some suggestions, Have a nice visit to New York!

Revolution Books - Anticapitalism
146 W. 26th Street (between 6th & 7th Ave.)
212-691-3345
Open 12 noon - 7 pm every day

Bluestockings - Radical Feminism
172 Allen St.
212.777.6028
Open Every Day
11am - 11pm

Book Culture - Said/Mamdani/Khalidi Central
536 W 112th (1/2 blk E of Bway)
(212) 865-1588
Open Weekdays 9am-10pm; Sat 10am-8pm; Sun 11am-7pm