Alibris.com

Bibliofind - Bibliofind has combined with Amazon.com

Bookfinder.com

Choosebooks.com

Information on publishing and the book industry
Bookwire.com

Publishers - by name, geographic location, subject, etc.

Care and Maintenance of Books
Frequently asked questions of the Northeast Document Conservation Center

Conservation and preservation information for books, paper, photographs, etc.

Book collecting
Massachusetts and Rhode Island Antiquarian Booksellers

Antiquarian Booksellers' Association of America

Awards, honors, and prizes
Book and Publishing Awards by various genres, authors and publishers.

AwardWeb: Collection of Literary Award Information (Pulitzer, Nobel, Mystery, Science Fiction, etc.)

ISLMC (Internet School Library Media Center) Children's and Young Adult Books and Media Awards

Booklists
Boston Public Library's Adult Booklists.

Boston Public Library's Booklists for Children.

Brookline Booksmith Bookstore's list of bestsellers (scroll down for list).

Harvard Book Store's list of bestsellers.

Oprah's (Winfrey) Book Club selections.

Publishers Weekly bestsellers.

YALSA (Young Adult Library Service Association) Booklists