China Scientific Book Services
Books on biology, ecology, environment, zoology, botany, and insects. English and Chinese version.
http://www.hceis.com/

Coronet Books
Distributor of academic and scientific books. List of titles on-line. Based in Philadelphia, PA, USA.
http://www.coronetbooks.com

CPL Press Online Bookshop
Offers scientific and technical publications including books and CD-ROMs.
http://www.cplpress.com

Editorial URSS Publishers
Russian scientific books in Russian, Spanish, and English languages. Currency is the Euro.
http://urss.ru/Welcome-en.shtml

Engineering Materials Advisory Services
Sandwich Construction publications to order online. Based in London, UK.
http://www.emas.net/

Fonteyn Sciences
Scientific books, CD-ROMs, and journals for professionals. Search by topic.
http://www.fonteynsciences.com

ISE Books
Selection of scientific books.
http://www.isebooks.com

Jewish Science and Technology Books
Works by or about Jewish scientists and technologists and their theories, discoveries and applications.
http://www.jewish-sci-tech-books.com/

National Science Teachers Association
Offers books, CD-ROMs, and posters.
http://store.nsta.org/

NCBI Bookshelf
The largest, and still growing, collection of state-of-the-art, biomedical textbooks that can be searched directly - from the National Library of Medicine.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=Books

The Flying Circus of Physics
Author biography, background of how the book was researched and written, and full index of the updated 2nd edition and links to where the book and related products may be bought.
http://www.flyingcircusofphysics.com/