This link will take you to the University of Neuchâtel's electronic rare bird books. Here you can read in electronic format Gould's The Birds of Asia and other classic works of ornithological interest; the plate drawings are quite extraordinary. The text is wonderful and rich too. Try this for an example: a stunning image of a Red-headed Vulture. Let me acknowledge Subramanian Sankar who posted the original link on Keralabirder.