Books

wababooks.com lists lots of used book sellers.

Find a book store through American Booksellers Association.

Indie Bookstore finder

Association of Book Sellers for Children

A Likely Story Children's Bookstore
 Alexandria, VA
closed after many years of service to the community (see Hooray 4 Books! in same location)

Better World Books is a B Corp, an  exciting new concept of how a business should work, benefitting society, not just stockholders.

Already Read Used Books
 Alexandria, VA

Bartleby's Books ("rare and antiquarian books and ephemera with emphasis on American History, and Law")
 Washington, DC

The Book Nook (used books)
 College Park, MD

The Book Nook (used books)
Glen Burnie, MD

Booktopia Books and Gifts for Children
Bethesda, MD

Busboys and Poets Books (has a small selection of progressive books)
Arlington, VA, Hyattsville, MD, and 2 locations in DC
100% wind powered

Chapters - A Literary Book Store
 Washington, DC

Hooray 4 Books!
 Alexandria, VA

Joshua Heller Rare Books
3720 Albemarle St NW, Washington, DC

Kramer Books
 (Dupont Circle), Washington, DC

Lambda Rising (gay and lesbian)
  (closed)

Olsson's Books and Records
(closed)

One More Page Books
  Arlington, VA

Politics and Prose Books and Coffee
 Washington, DC
tribute page for bookstore co-founder Carla Cohen
about new print-on-demand machine (good for printing out of print or hard to find books, as well as for self publishing)

Presse Bookstore
 Washington, DC

Reiters (technical, medical and professional books)
 Washington, DC

Reston's Used Book Shop
  Reston, VA

Sacred Circle Books (metaphysical books)
Alexandria,VA

Second Story Books (used books)
 (Dupont Circle), Washington, DC

Second Story Books (used books)
 Rockville, MD

Second Story Books (used books)
 Bethesda, MD

Tree Top Kids (children's books)
 Washington, DC