It's a handbound copy of a poem by Carlos Jesus Garcia called Ritual del Pez (The Fish's Ritual). The text is in Spanish and English. The cover is made from sheets of handmade paper glued at the spine, and decorated with thin pieces of wood (the "v" shaped pieces on the cover). The fish on the cover is in ink and watercolor, and the paper was embossed so the fish rises up from the paper a bit.
This is one of the inside pages:
As you can see, the illustrations are just fantastic. According to the colophon, the pages (if my Spanish doesn't fail me entirely) were printed on an 1816 Gordon and Price press.
Here is another page:
And the back cover:
Of course now I'm wishing I'd bought more books, but my travel bag was the size of a teaspoon (well, it seemed like it anyway), so I resisted temptation. Sigh.