It needs to be cleaned up or redone entirely, literally every Prima link is dead so remove them? The namings are all over the place and you have no idea what they are because half are just rar archives so maybe it's a PDF or maybe it's a folder with jpeg's, or a cbr, etc. Some are just flat out wrong for what they are saying, "Official" when it is not, I had examples but it's been a long time but I think Zelda Versus guide was one of the mix ups involving this.
Currently it's like this just searching for Final Fantasy VII:
Bradygames - Final Fantasy 07 (PC)
Bradygames - Final Fantasy 07 (PSX)
Final Fantasy VII [BradyGames]
Final Fantasy VII Official Strategy Guide
Final Fantasy VII Guides [Unofficial]
Final Fantasy PC VII Strategy Guide
Final Fantasy VII - Versus Books Ultimate Guide (NEW)
Final Fantasy VII - Versus Books Ultimate Guide (OLD)
Separating them by publisher is annoying, everything should be alphabetical, a thumbnail picture of the front would probably be a good idea as well so there is no confusion, they should be labeled [PDF] [JPEG] [CBR] accordingly, (incomplete) (missing pages) (low quality) or (watermarks) if required, remove redundant links because there are many duplicates just with different names. It should look something more like this.
Final Fantasy VII [BradyGames] [JPEG]
Final Fantasy VII [BradyGames] [PDF]
Final Fantasy VII [BradyGames] [PDF] (incomplete)
Final Fantasy VII [Versus Books] [PDF]
Final Fantasy VII [Versus Books] [PDF] (low quality)
You get the idea.