Bibliomania
For book collectors, or just book lovers, a vast collection of links covering topics from book repair to identifying first editions.

Book Terms Illustrated (powells.com)
A helpful photograph accompanies each book term, along with its usage. Guide also outlines condition criteria.

Bookseller World
Bibliographies, articles and guides on book collecting and dealers.

Collecting Modern First Editions
Bookseller discusses collecting modern firsts (Alibris.com).

Collecting Telephone Books
The story of an uncommon hobby.

Exlibrisland.com - bookplates collecting and exchange
The ultimate source for exlibris collectors. Art of bookplate collecting. Bookplate magazine: history of ex-libris, bookplate today, ex-libris personalities - artists and owners.

FAQs: rec.collecting.books
Provides FAQs from the usenet newsgroup.

Guide to Rare and Old Book Values
Collectible book value guide, author autograph guide, eBay auction book selling tips, and book collecting links.

Information on Facsimile Books
An introduction to facsimile books, faithful recreations of the original.

The Bookplate Society
An international society of exlibris collectors, bibliophiles, artists, heralds, family historians and others dedicated to promoting the design, use and study of bookplates

Trussel: Books and Book Collecting
A large collection of information and links useful to book collectors.

Your Old Books
FAQs cover rare books and book values (not a pricing guide).