Current Protocols - A series of books that strive to be an "authoritative, up-to-date, and comprehensive source for research methods and topical overviews" for the life sciences. Tables of contents and sample chapters available. - http://www.currentprotocols.com/
Papers in Biomedical Sciences - Full text of original papers from the 19th century onwards that Donald Forsdyke deems critical to the understanding of some major problems in the biomedical sciences. - http://post.queensu.ca/~forsdyke/homepage.htm
Natural History Museum Publishing - Produces a wide range of natural history books and bulletins. Full catalog with online shopping. - http://www.nhm.ac.uk/services/publishing/