Books
http://www.econlib.org/ (Rank: 33370)
http://www.booksalefinder.com/ (Rank: 67572)
http://www.isbn.org/ (Rank: 87813)
http://www.instruction-manuals.co.uk (Rank: 156566)
http://isbn-international.org/ (Rank: 246963)
http://www.creativenonfiction.org/ (Rank: 329964)
http://isbntools.com/ (Rank: 690751)
http://www.resourcehelp.com/qserbooks.htm (Rank: 924587)
http://www.bloomsburymagazine.com/ARC/ (Rank: 1454797)
http://www.hss.ed.ac.uk/chb/ (Rank: 2320003)
http://www.literatureclassics.com/ancientpaths/religionbk.html (Rank: 2749032)
http://www.bookartworld.co.uk/ (Rank: 2866428)