Help!! What is this box?

I don't look for free manuals or manuals on CD or downloadable. I prefer printed manuals and first editions at that. Much less room for errors being transposed from one format to another, plus you have a BOOK you can put your hands on instead of relying on a computer that may have problems of its own. I just hawk ebay and find a good used manual I can afford. Just my opinion.

Here's a very affordable two volume set in great condition from a seller with perfect feedback.
Service Manuals