Looking for a place to donate your gentley used books? There are many organizations (both here in the USA as well as overseas) that accept gently used books:
Guidelines for Donating Medical Books, Journals, and Media Overseas
http://www.entnet.org/Community/public/loader.cfm?csModule=security/getfile&pageid=39565 Some of the links are not working, but there is contact information for many of the organizations.
Operation Giving Back
Directory of Book Donation Programs
University of Buffalo Health Sciences Library
http://libweb.lib.buffalo.edu/dokuwiki/hslwiki/doku.php?id=book_donationsUse the menu on the left side of the page to locate organization in various countries that accept used books.