From its origins at the end of the 1830s, photography has never ceased to evolve both aesthetically and technologically. The past decade has given rise to the new age of digital photography, so Looking at Photographs , first published in 1991, has been revised and updated to define and illustrate terms from the earliest processes to this new technology. At once a rich and informative glossary and a history of the medium, this fully illustrated guide will be invaluable to all those wishing to increase their understanding and enjoyment of the art of photography.
I find this useful for technical photography descriptions. It's a reference that basically reads as a dictionary for technical photo terminology (as the title says). When you are wondering what to call the brown spots on your image? Look up "foxing". When trying to figure out the difference between ambrotypes and daguerrotypes, this is really helpful (ambrotypes stay positive no matter the angle you look at the image).