But you do get that. Better actually, because you can approach it on multiple axis (something the real world is physically incapable of): if the author has published multiple books you can click that axis and follow along it, and if not you not Amazon lists similar and related books.

For non-fiction, the books around it will just be either the authors other books, or books that are very close in the dewey-decimal system. Again, trivial to get online.