It's great that there are things which are free, but a link to nearly 2,000 articles chosen just for their inclusion of the word "photography" (but not photo, picture, image, camera....) in the title seems a bit general. Far better than 2,000 would be a list of the 20 books that YOU find really worthwhile to read.
(this is probably a good time to point out that I haven't read enough about photos yet to put together my own top-20 book list)