Here's one of the most beautiful books from AD&D 2nd edition. Al-Qadim Arabian Adventures!
The cover is of high-quality paper, and the colorful border is embossed, so there's a nice feel as soon as you pick up the book.
The pages inside have a gold border along the top of the text and a little gold corner art.
The Al-Quadim setting is the first time TSR used one artist for interior illustration for a whole line: Karl Waller.
https://www.etsy.com/listing/1391333555/al-qadim-arabian-adventures-vintage-tsr