J.F.Ptak Books
General titles and science books for sale.
http://www.thesciencebookstore.com/

JHWhite PubsCo
Selection of books, focussing on the mind, money and self help.
http://www.aniota.com/~jwhite/

Jones Sands Publishing
Books and general literature on maritime art and English history. News, articles and information included.
http://www.jones-sands-publishing.com/

Joseph-Beth Booksellers
Offers online book title browsing and shopping.
http://www.josephbeth.com/

Judi's Online Bookstore
Featuring new authors; murder espionage novels or life during The Great Depression.
http://www.galaxymall.com/books/judisbookstore/