I have often added an Amazon link on pages of this site, pointing to books of specific relevance. Regimental histories and the like. Amazon has recently changed the way it serves these links and where a nice image would once have appeared on the page, readers now see a grey blank and no link.
So I am gradually removing them. My apologies if you come across one.
Many of these books are now freely available as digital downloads, anyway, so where relevant I will link to that instead.