Even though the Nexus 9 is being marketed by Google, in reality it's an HTC-manufactured tablet (no doubt with plenty of design input from the former).
You can easily identify the Nexus 9 by its model number, OP82100.
Hey, HTC! Just a heads-up: when using the word "guia" to describe a guidebook or directory, it is a feminine noun. That makes it la guía.