You see here a bunch of guides to the area, ranging from the very glossy to the plain and practical. The one on top, which is clearly the most worn, looks nicely indexed and a bit hierarchical; it just says Yahoo! on it.
Beneath that are several immensely thick tomes, which are mostly permuted indexes on everything imaginable; one's cover says Lycos, another AltaVista. And beneath that is a guide book to guide books, simply called "Search".
Next to those are some more targeted books. The relatively worn ones appear to be Switchboard (a phone book) and MapQuest (a road atlas).