Hot off the Press! These are not your eldritch manuals or ancient folios of doom. These are random books, a GM can use whenever a PC reaches for a shelf, which usually happens when said GM is least expecting it. These can be found in most libraries, many private homes, and anywhere else one could expect to find a book. More than a few have some built-in plot hooklings as well, while others, like many books of our age, are plain drivel.
The Akhal-Teke is a real horse breed that develops a metallic golden coat. A more fantastic version could have a coat the color of pure gold, or silver making the horse appear to be made of the precious metal.