Hidden Treasure: National Library of Medicine

A book on the historical material held in the National Library of Medicine in Maryland USA is currently available free to view online at http://collections.nlm.nih.gov/ext/pub/HIDDENTREASURE_NLM_BlastBooks.pdf and is full of lots of high quality images of books reaching back to 1485 CE and from around the world. For a glimpse of how medicine has evolved through the centuries, it's worth a look!