I had initially thought that I was going to have to move out the various travel books to a box, but once I got into sorting things out it became apparent that I was going to be able to get all the travel books, museum books, guide booklets for various sites, and English-Whatever phrasebooks on the shelf, with the stack of assorted maps on top of the books, and nearly all the key "ephemera" in a box that likewise ended up on top of the books. I rock!
There are still two shelves on C4 that need to be "dealt with" but they are (as is the case with many of the S4's and S5's in here) buried behind "stuff" that I'll have to move to get at them. Hmmm ... I guess this whole thing got started with my thinking about accessing the books on C3-S(4-5), and I went back over the other side of my desk to see if the route to those shelves would be any easier from there than trying to pull them out of a 6" gap under my desk. I guess dealing with C4-S(1-3) looked more promising at the time than trying to crawl under furniture, so the old OCD kicked in and I got into an "organizing" frenzy!