Hi Miguel,
That's reasonable. I looked over what you posted again, and I have to agree that your posting does fit the four rules of fair use. In an ideal world, it would be good to have a link to each book, but I think the Osprey Publishing link at the top is sufficient.
However, the fact that we're having a discussion about fair use on this thread, rather than on the pictures, makes Jim's point better than anything else. For me, this thread takes a while to load, simply because of the images uploaded. Effectively, the pictures are now bogging down the discussion, even though this was not your intention when you posted them. My fault, really.
Rick also raises a good point, about the limited bandwidth of the site.
F