Gemm Books
Combines catalogs of book sellers.
http://gemmbooks.com/

GLB Worldwide
Publisher's book shop.
http://www.glbworld.com

Gordon Soules Book Publishing
Books on a variety of subjects, with prices and information.
http://www.gordonsoules.com/

Gorsky Press
Small publishing company. Contests, samples from published books, ordering information, short biographies of their authors, and critics' reviews.
http://www.gorskypress.com/

Graphic Arts Center Publishing Company
Books, in the subject areas of regional, gardening, photo essay, nature, travel, cooking, and children's.
http://www.gacpc.com