In the hope not just to follow the stream, but to be interestingly complementary to them, more focused views of specific regions will be supplied here. Such a bibliography does not aim at an abstract completeness, but it should reasonably cover all the material worth mentioning, or at least what so seems in the opinion of the author. As it is in the field guide genre, the reader is provided with helpful signposts by experienced authors, but is encouraged to eventually take his own path. In the continuous effort of enlarging and keeping them updated, the tours will be always in progress. Here is a very stimulating place to visit, where one can begin or refine one's searches.
Authors are top experts in their fields.
All in all, it's a superb accomplishment. This inspired the present page. An invaluable resource of hundreds of items listed under useful headings. The annotations are short, but always brilliant and penetrating. Now, only updated annually, without new annotations.