This is an example of the modern Cordoban leather style. I purchased this notepad book while at the 1999 Encuentros in Spain. There I learned about all sorts of different artists and styles, not the least of which was the Cordoban style. In a nutshell, it's embossing. They use a different technique, though, using modeling clay on a board, and forming the leather *over* the clay, rather than using a ball stylus to emboss the leather from behind as in other techniques. After the leather is embossed, the back is painted with glue so that the leather retains the embossing best.